JEE Main
Physics
Ray & Wave Optics
Previous Years Questions

Two objects A and B are placed at 15 cm and 25 cm from the pole in front of a concave mirror having radius of curvature 40 cm. The distance between im...
'$$n$$' polarizing sheets are arranged such that each makes an angle $$45^{\circ}$$ with the preceeding sheet. An unpolarized light of intensity I is ...
A microscope is focused on an object at the bottom of a bucket. If liquid with refractive index $\frac{5}{3}$ is poured inside the bucket, then the m...
Two polaroide $$\mathrm{A}$$ and $$\mathrm{B}$$ are placed in such a way that the pass-axis of polaroids are perpendicular to each other. Now, another...
A thin prism $P_1$ with an angle $6^{\circ}$ and made of glass of refractive index $1.54$ is combined with another prism $P_2$ made from glass of refr...
A person has been using spectacles of power $$-1.0$$ dioptre for distant vision and a separate reading glass of power $$2.0$$ dioptres. What is the le...
A scientist is observing a bacteria through a compound microscope. For better analysis and to improve its resolving power he should. (Select the best ...
Which of the following are true? A. Speed of light in vacuum is dependent on the direction of propagation. B. Speed of light in a medium is independen...
In a Young's double slit experiment, two slits are illuminated with a light of wavelength $$800 \mathrm{~nm}$$. The line joining $$A_{1} P$$ is perpen...
The light rays from an object have been reflected towards an observer from a standard flat mirror, the image observed by the observer are :- A. Real B...
In Young's double slits experiment, the position of 5$$\mathrm{^{th}}$$ bright fringe from the central maximum is 5 cm. The distance between slits and...
When a beam of white light is allowed to pass through convex lens parallel to principal axis, the different colours of light converge at different poi...
Given below are two statements : Statement I : If the Brewster's angle for the light propagating from air to glass is $$\mathrm{\theta_B}$$, then the ...
An unpolarised light beam of intensity $$2 I_{0}$$ is passed through a polaroid P and then through another polaroid Q which is oriented in such a way ...
Light enters from air into a given medium at an angle of $$45^{\circ}$$ with interface of the air-medium surface. After refraction, the light ray is d...
The power of a lens (biconvex) is $$1.25 \mathrm{~m}^{-1}$$ in particular medium. Refractive index of the lens is 1.5 and radii of curvature are $$20 ... As shown in the figure, after passing through the medium 1 . The speed of light$$v_{2}$$in medium 2 will be :$$\left(\right.$$Given$$\mathrm{c}=3...
In normal adujstment, for a refracting telescope, the distance between objective and eye piece is $$30 \mathrm{~cm}$$. The focal length of the objecti...
Two coherent sources of light interfere. The intensity ratio of two sources is $$1: 4$$. For this interference pattern if the value of $$\frac{I_{\max... A microscope was initially placed in air (refractive index 1). It is then immersed in oil (refractive index 2). For a light whose wavelength in air is... Light travels in two media$$M_{1}$$and$$M_{2}$$with speeds$$1.5 \times 10^{8} \mathrm{~ms}^{-1}$$and$$2.0 \times 10^{8} \mathrm{~ms}^{-1}$$res... In Young's double slit experiment, the fringe width is$$12 \mathrm{~mm}$$. If the entire arrangement is placed in water of refractive index$$\frac{4...
For an object placed at a distance 2.4 m from a lens, a sharp focused image is observed on a screen placed at a distance 12 cm from the lens. A glass ...
Which of the following statement is correct?
Time taken by light to travel in two different materials $$A$$ and $$B$$ of refractive indices $$\mu_{A}$$ and $$\mu_{B}$$ of same thickness is $$t_{1... Find the ratio of maximum intensity to the minimum intensity in the interference pattern if the widths of the two slits in Young's experiment are in t... The speed of light in media 'A' and 'B' are$$2.0 \times {10^{10}}$$cm/s and$$1.5 \times {10^{10}}$$cm/s respectively. A ray of light enters from t... Using Young's double slit experiment, a monochromatic light of wavelength 5000$$\mathop A\limits^o $$produces fringes of fringe width 0.5 mm. If ano... In Young's double slit experiment performed using a monochromatic light of wavelength$$\lambda$$, when a glass plate ($$\mu$$= 1.5) of thickness x$$...
The refracting angle of a prism is A and refractive index of the material of the prism is cot (A/2). Then the angle of minimum deviation will be -...
The aperture of the objective is 24.4 cm. The resolving power of this telescope, if a light of wavelength 2440 $$\mathop A\limits^o$$ is used to see ...
A convex lens has power P. It is cut into two halves along its principal axis. Further one piece (out of the two halves) is cut into two halves perpen...
Consider a light ray travelling in air is incident into a medium of refractive index $$\sqrt{2n}$$. The incident angle is twice that of refracting ang...
In free space, an electromagnetic wave of 3 GHz frequency strikes over the edge of an object of size $${\lambda \over {100}}$$, where $$\lambda$$ is ...
The interference pattern is obtained with two coherent light sources of intensity ratio 4 : 1. And the ratio $${{{I_{\max }} + {I_{\min }}} \over {{I_... A light whose electric field vectors are completely removed by using a good polaroid, allowed to incident on the surface of the prism at Brewster's an... The two light beams having intensities I and 9I interfere to produce a fringe pattern on a screen. The phase difference between the beams is$$\pi$$/2... A light wave travelling linearly in a medium of dielectric constant 4, incidents on the horizontal interface separating medium with air. The angle of... The difference of speed of light in the two media A and B (vA$$-$$vB) is 2.6$$\times$$107 m/s. If the refractive index of medium B is 1.47, then t... Two light beams of intensities in the ratio of 9 : 4 are allowed to interfere. The ratio of the intensity of maxima and minima will be : A glass tumbler having inner depth of 17.5 cm is kept on a table. A student starts pouring water ($$\mu$$= 4/3) into it while looking at the surface ... Two plane mirrors M1 and M2 are at right angle to each other shown. A point source 'P' is placed at 'a' and '2a' meter away from M1 and M2 respectivel... Curved surfaces of a plano-convex lens of refractive index$$\mu$$1 and a plano-concave lens of refractive index$$\mu$$2 have equal radius of curvatu... The light waves from two coherent sources have same intensity I1 = I2 = I0. In interference pattern the intensity of light at minima is zero. What wil... An object is placed beyond the centre of curvature C of the given concave mirror. If the distance of the object is d1 from C and the distance of the i... Find the distance of the image from object O, formed by the combination of lenses in the figure :... Car B overtakes another car A at a relative speed of 40 ms$$-$$1. How fast will the image of car B appear to move in the mirror of focal length 10 cm ... The expected graphical representation of the variation of angle of deviation '$$\delta$$' with angle of incidence 'i' in a prism is : The relative permittivity of distilled water is 81. The velocity of light in it will be :(Given$$\mu$$r = 1) In Young's double slit experiment, if the source of light changes from orange to blue then : A prism of refractive index$$\mu$$and angle of prism A is placed in the position of minimum angle of deviation. If minimum angle of deviation is als... A ray of light entering from air into a denser medium of refractive index$${4 \over 3}$$, as shown in figure. The light ray suffers total internal re... A ray of laser of a wavelength 630 nm is incident at an angle of 30$$^\circ$$at the diamond-air interface. It is going from diamond to air. The refra... In the Young's double slit experiment, the distance between the slits varies in time as d(t) = d0 + a0 sin$$\omega$$t; where d0,$$\omega$$and a0 are... A ray of light passes from a denser medium to a rarer medium at an angle of incidence i. The reflected and refracted rays make an angle of 90$$^\circ$... With what speed should a galaxy move outward with respect to earth so that the sodium-D line at wavelength 5890 $$\mathop A\limits^o$$ is observed at... Region I and II are separated by a spherical surface of radius 25 cm. An object is kept in region I at a distance of 40 cm from the surface. The dista... Three rays of light, namely red (R), green (G) and blue (B) are incident on the face PQ of a right angled prism PQR as shown in the figure.The refract... In Young's double slit arrangement, slits are separated by a gap of 0.5 mm, and the screen is placed at a distance of 0.5 m from them. The distance be... Your friend is having eye sight problem. She is not able to see clearly a distant uniform window mesh and it appears to her as non-uniform and distort... The thickness at the centre of a plane convex lens is 3 mm and the diameter is 6 cm. If the speed of light in the material of the lens is 2 $$\times$$... The refractive index of a converging lens is 1.4. What will be the focal length of this lens if it is placed in a medium of same refractive index? Ass... Red light differs from blue light as they have : The angle of deviation through a prism is minimum when(A) Incident ray and emergent ray are symmetric to the prism.(B) The refracted ray inside the pr... The incident ray, reflected ray and the outward drawn normal are denoted by the unit vectors $$\overrightarrow a$$, $$\overrightarrow b$$ and $$\ove... Given below are two statements : one is labeled as Assertion A and the other is labeled as Reason R.Assertion A : For a simple microscope, the angular... A short straight object of height 100 cm lies before the central axis of a spherical mirror whose focal length has absolute value | f | = 40 cm. The i... In a Young's double slit experiment two slits are separated by 2 mm and the screen is placed one meter away. When a light of wavelength 500 nm is used... Consider the diffraction pattern obtained from the sunlight incident on a pinhole of diameter 0.1$$\mu$$m. If the diameter of the pinhole is slightly... Two coherent light sources having intensity in the ratio 2x produce an interference pattern. The ratio$${{{I_{\max }} - {I_{\min }}} \over {{I_{\max ... If the source of light used in a Young's double slit experiment is changed from red to violet : The focal length f is related to the radius of curvature r of the spherical convex mirror by : In a Young's double slit experiment, the width of the one of the slit is three times the other slit. The amplitude of the light coming from a slit is ... A double convex lens has power P and same radii of curvature R of both the surfaces. The radius of curvature of a surface of a plano-convex lens made ... In the figure below, P and Q are two equally intense coherent sources emitting radiation of wavelength 20 m. The separation between P and Q is 5 m and... A point like object is placed at a distance of 1 m in front of a convex lens of focal length 0.5 m. A plane mirror is placed at a distance of 2 m behi... For a concave lens of focal length f, the relation between object and image distances u and v, respectively, from its pole can best be represented by ... A beam of plane polarised light of large cross-sectional area and uniform intensity of 3.3 Wm-2 falls normally on a polariser (cross sectional area 3 ... Two light waves having the same wavelength $$\lambda$$ in vacuum are in phase initially. Then the first wave travels a path L1 through a medium of r... In a Young’s double slit experiment, light of 500 nm is used to produce an interference pattern. When the distance between the slits is 0.05 mm, the a... In a Young’s double slit experiment, 16 fringes are observed in a certain segment of the screen when light of a wavelength 700 nm is used. If the wave... Interference fringes are observed on a screen by illuminating two thin slits 1 mm apart with a light source ($$\lambda$$ = 632.8 nm). The distance be... A spherical mirror is obtained as shown in the figure from a hollow glass sphere. If an object is positioned in front of the mirror, what will be the... There is a small source of light at some depth below the surface of water (refractive index = $${4 \over 3}$$) in a tank of large cross sectional surf... A vessel of depth 2h is half filled with a liquid of refractive index $$2\sqrt 2$$ and the upper half with another liquid of refractive index $$\sqrt... The aperture diameter of a telescope is 5m. The separation between the moon and the earth is 4 × 105 km. With light of wavelength of 5500$$\mathop A\... In a double slit experiment, at a certain point on the screen the path difference between the two interfering waves is $${1 \over 8}$$th of a waveleng... An object is gradually moving away from the focal point of a concave mirror along the axis of the mirror. The graphical representation of the magnitud... The magnifying power of a telescope with tube 60 cm is 5. What is the focal length of its eye piece ? The critical angle of a medium for a specific wavelength, if the medium has relative permittivity 3 and relative permeability $${4 \over 3}$$ for this... A thin lens made of glass (refractive index = 1.5) of focal length f = 16 cm is immersed in a liquid of refractive index 1.42. If its focal length in ... In a Young's double slit experiment, the separation between the slits is 0.15 mm. in the experiment, a source of light of wavelengh 589 nm is used and... A polarizer - analyser set is adjusted such that the intensity of light coming out of the analyser is just 10% of the original intensity. Assuming tha... If we need a magnification of 375 from a compound microscope of tube length 150 mm and an objective of focal length 5 mm, the focal length of the eye-... Visible light of wavelength 6000 $$\times$$ 10-8 cm falls normally on a single slit and produces a diffraction pattern. It is found that the second ... A transparent cube of side, made of a material of refractive index $$\mu$$2, is immersed in a liquid of refractive index $$\mu$$1($$\mu$$1 < $$\... A system of three polarizers P1, P2, P3 is set up such that the pass axis of P3 is crossed with respect to that of P1. The pass axis of P2 is inclined... The value of numerical aperature of the objective lens of a microscope is 1.25. If light of wavelength 5000$$\mathop A\limits^o $$is used, the minim... In a double slit experiment, when a thin film of thickness t having refractive index$$\mu $$. is introduced in front of one of the slits, the maximum... A concave mirror has radius of curvature of 40 cm. It is at the bottom of a glass that has water filled up to 5 cm (see figure). If a small particle i... In a Young's double slit experiment, the ratio of the slit's width is 4 : 1. The ratio of the intensity of maxima to minima, close to the central frin... The graph shows how the magnification m produced by a thin lens varies with image distance v. What is the focal length of the lens used? ... One plano-convex and one plano-concave lens of same radius of curvature 'R' but of different materials are joined side by side as shown in the figure.... A ray of light AO in vacuum is incident on a glass slab at angle 60° and refracted at angle 30° along OB as shown in the figure. The optical path leng... A thin convex lens L (refractive index = 1.5) is placed on a plane mirror M. When a pin is placed at A, such that OA = 18 cm, its real inverted image ... Diameter of the objective lens of a telescope is 250 cm. For light of wavelength 600nm. coming from a distant object, the limit of resolution of the t... A convex lens of focal length 20 cm produces images of the same magnification 2 when an object is kept at two distances x1 and x2 (x1 > x2) from th... The figure shows a Young's double slit experimental setup. It is observed that when a thin transparent sheet of thickness t and refractive index μ is ... A concave mirror for face viewing has focal length of 0.4 m. The distance at which you hold the mirror from your face in order to see your image uprig... Calculate the limit of resolution of a telescope objective having a diameter of 200 cm, if it has to detect light of wavelength 500 nm coming from a s... A convex lens (of focal length 20 cm) and a concave mirror, having their principal axes along the same lines, are kept 80 cm apart from each other. Th... An upright object is placed at a distance of 40 cm in front of a convergent lens of focal length 20 cm. A convergent mirror of focal length 10 cm is p... In figure, the optical fiber is$$l$$= 2m long and has a diameter of d = 20 μm. If a ray of light is incident on one end of the fiber at angle$$\the... In an interference experiment the ratio of amplitudes of coherent waves is $${{{a_1}} \over {{a_2}}} = {1 \over 3}$$ . The ratio of maximum and minimu... A plano-convex lens (focal length f2, refractive index $$\mu$$2, radius of curvature R) fits exactly into a plano-concave lens (focal length f1, refr... Formation of real image using a biconvex lens is shown below : If the whole set up is immersed in water without disturbing the object and the screen ... A light wave is incident normally on a glass slab of refractive index 1.5. If 4 % of light gets reflected and the amplitude of the electric field of t... A point source of light, S is placed at distance L in front of the centre of plane mirror of width d which is hanging vertically on a wall. A man walk... What is the position and nature of image formed by lens combination shown in figure ? (f1, f2 are focal lengths) ... In a double-slit experiment, green light (5303$$\mathop A\limits^ \circ$$) falls on a double slit having a separation of 19.44 $$\mu$$m and awidht ... A monochromatic light is incident at a certain angle on an equilateral triangular prism and suffers minimum deviation. If the refractive index of the ... In a Young's double slit experiment, the path difference, at a certain point on the screen, between two interfering waves is $${1 \over 8}$$ th of wav... An object is at a distance of 20 m from a convex lens of focal length 0.3 m. The lens forms an image of the object. If the object moves away from the ... The variation of refractive index of a crown glass thin prism with wavelength of the incident light is shown. Which of the following graphs is the cor... The eye can be regarded as a single refracting surface. The radius of curvature of this surface is equal to that of cornea (7.8 mm). This surface sepa... Consider a Young’s double slit experiment as shown in figure. What should be the slit separation d in terms of wavelength $$\lambda$$ such that the f... In a Young’s double slit experiment with slit separation 0.1 mm, one observes a bright fringe at angle $${1 \over {40}}$$ by using light of waveleng... A plano convex lens of refractive index $$\mu$$1 and focal length ƒ1 is kept in contact with another plano concave lens of refractive index $$\mu$$2... In a Young's double slit experiment, the slits are placed 0.320 mm apart. Light of wavelength $$\lambda$$ = 500 nm is incident on the slits. The tota... Two plane mirrors are inclined to each other such that a ray of light incident on the first mirror (M1) and parallel to the second mirror (M2) is fina... A convex lens is put 10 cm from a light source and it makes a sharp image on a screen, kept 10 cm from the lens. Now a glass block (refractive index 1... Consider a tank made of glass(refractive index 1.5) with a thick bottom. It is filled with a liquid of refractive index $$\mu$$. A student finds that... A ray of light is incident at an angle of 60o on one face of a prism of angle 30o. The emergent ray of light makes an angle of 30o with incident ray.... Unpolarized light of intensity I is incident on a system of two polarizers, A followed by B. The intensity of emergent light is I/2. If a third polar... The angular width of the central maximum in a single slit diffraction pattern is 60°. The width of the slit is 1 $$\mu$$m. The slit is illuminated by... Unpolarized light of intensity I passes through an ideal polarizer A. Another identical polarizer B is placed behind A. The intensity of light beyond ... A plane polarized light is incident on a polariser with its pass axis aking angle $$\theta$$ with x-axis, as shown in the figure. At four different ... A convergent doublet of separated lenses, corrected for spherical aberration, has resultant focal length of 10 cm. The separation between the two lens... Light of wavelength $$550$$ $$nm$$ falls normally on a slit of width $$22.0 \times {10^{ - 5}}$$ $$cm.$$ The angular position of the second minima fro... A planoconvex lens becomes an optical system of $$28$$ $$cm$$ focal length when its plane surface is silvered and illuminated from left to right as sh... A particle is oscillating on the $$X$$-axis with an amplitude $$2$$ $$cm$$ about the point $${x_0} = 10\,cm,$$ with a frequency $$\omega$$. A concave... In an experiment a convex lens of focal length 15 cm is placed coaxially on an optical bench in front of a convex mirror at a distance of 5 cm from it... A single slit of width 0.1 mm is illuminated by a parallel beam of light of wavelength 6000 $$\mathop A\limits^ \circ$$ and diffraction bands are ob... A single slit of width b is illuminated by a coherent monochromatic light of wavelength $$\lambda$$. If the second and fourthminima in the diffracti... Let the refractive index of a denser medium with respect to a rarer medium be n12 and its critical angle be θC . At an angle of incidence A when light... An observer is moving with half the speed of light towards a stationary microwave source emitting waves at frequency 10 GHz. What is the frequency of ... In a Young’s double slit experiment, slits are separated by 0.5 mm, and the screen is placed 150 cm away. A beam of light consisting of two wavelength... A diverging lens with magnitude of focal length 25 cm is placed at a distance of 15cm from a converging lens of magnitude of focal length 20cm. A beam... Two stars are 10 light years away from the earth. They are seen through a telescope of objective diameter 30 cm. The wavelength of light is 600 nm. To... To determine refractive index of glass slab using a travelling microscope, minimum number of readings required are : A hemispherical glass body of radius 10 cm and refractive index 1.5 is silvered on its curved surface. A small air bubble is 6 cm below the flat surfa... In Young’s double slit experiment, the distance between slits and the screen is 1.0 m and monochromatic light of 600 nm is being used. A person standi... To find the focal length of a convex mirror, a student records the following data : .tg {border-collapse:collapse;border-spacing:0;} .tg td{font-fam... A convex lens, of focal length 30 cm, a concave lens of focal length 120 cm, and aplane mirror are arranged as shown. For an object kept at a distance... The box of a pin hole camera, of length $$L,$$ has a hole of radius a. It is assumed that when the hole is illuminated by a parallel beam of light of ... In an experiment for determination of refractive index of glass of a prism by $$i - \delta ,$$ plot it was found thata ray incident at angle $${35^ \c... An observer looks at a distant tree of height$$10m$$with a telescope of magnifying power of$$20.$$To the observer the tree appears: Arrange the following electromagnetic radiations per quantum in the order of increasing energy : A : Blue light &nb... On a hot summer night, the refractive index of air is smallest near the ground and increases with height from the ground. When a light beam is direc... Assuming human pupil to have a radius of$$0.25cm$$and a comfortable viewing distance of$$25cm$$, the minimum separation between two objec... Monochromatic light is incident on a glass prism of angle$$A$$. If the refractive index of the material of the prism is$$\mu $$, a ray, incident at ... Two beams,$$A$$and$$B$$, of plane polarized light with mutually perpendicular planes of polarization are seen through a polaroid. From the positio... A thin convex lens made from crown glass$$\left( {\mu = {3 \over 2}} \right)$$has focal length$$f$$. When it is measured in two different liquids ... A green light is incident from the water to the air - water interface at the critical angle$$\left( \theta \right)$$. Select the correct statement. Diameter of a plano-convex lens is$$6cm$$and thickness at the center is$$3mm$$. If speed of light in material of lens is$$2 \times {10^8}\,m/... A beam of unpolarised light of intensity $${{\rm I}_0}$$ is passed through a polaroid $$A$$ and then through another polaroid $$B$$ which is oriented ... Two coherent point sources $${S_1}$$ and $${S_2}$$ are separated by a small distance $$'d'$$ as shown. The fringes obtained on the screen will be ... The graph between angle of deviation $$\left( \delta \right)$$ and angle of incidence $$(i)$$ for a triangular prism is represented by In Young's double slit experiment , one of the slit is wider than other, so that amplitude of the light from one slit is double of that from other sli... An electromagnetic wave in vacuum has the electric and magnetic field $$\mathop E\limits^ \to$$and $$\mathop B\limits^ \to$$, which are always per... An object $$2.4$$ $$m$$ in front of a lens forms a sharp image on a film $$12$$ $$cm$$ behind the lens. A glass plate $$1$$ $$cm$$ thick, of refracti... Let $$x$$-$$z$$ plane be the boundary between two transparent media. Medium $$1$$ in $$z \ge 0$$ has a refractive index of $$\sqrt 2$$ and medium $$2... A car is fitted with a convex side-view mirror of focal length$$20cm$$. A second car$$2.8m$$behind the first car is overtaking the first car a... This question has a paragraph followed by two statements, Statement$$-1$$and Statement$$-2$$. Of the given four alternatives after the statements,... An initially parallel cylindrical beam travels in a medium of refractive index$$\mu \left( I \right) = {\mu _0} + {\mu _2}\,I,$$where$${\mu _0}$$a... An initially parallel cylindrical beam travels in a medium of refractive index$$\mu \left( I \right) = {\mu _0} + {\mu _2}\,I,$$where$${\mu _0}$$a... An initially parallel cylindrical beam travels in a medium of refractive index$$\mu \left( I \right) = {\mu _0} + {\mu _2}\,I,$$where$${\mu _0}$$a... A mixture of light, consisting of wavelength$$590mm$$and an unknown wavelength, illuminates Young's double slit and gives rise to two overlappi... In an optics experiment, with the position of the object fixed, a student varies the position of a convex lens and for each position, the screen is ad... A transparent solid cylindrical rod has a refractive index of$${2 \over {\sqrt 3 }}.$$It is surrounded by air. A light ray is incident at the mid-po... A student measures the focal length of a convex lens by putting an object pin at a distance$$'u'$$from the lens and measuring the distance$$'v'$$o... In a Young's double slit experiment the intensity at a point where the path difference is$${\lambda \over 6}$$($$\lambda $$being the wavelength o... Two lenses of power$$-15D$$and$$+5D$$are in contact with each other. The focal length of the combination is The refractive index of a glass is$$1.520$$for red light and$$1.525$$for blue light. Let$${D_1}$$and$${D_2}$$be angles of minimum deviation fo... A fish looking up through the water sees the outside world contained in a circular horizon. If the refractive index of water is$${4 \over 3}$$and th... Two point white dots are$$1mm$$apart on a black paper. They are viewed by eye of pupil diameter$$3mm.$$Approximately, what is the maximu... A Young's double slit experiment uses a monochromatic source. The shape of the interference fringes formed on a screen is A thin glass (refractive index$$1.5$$) lens has optical power of$$-5D$$in air. Its optical power in a liquid medium with refractive index$$1.... If $${I_0}$$ is the intensity of the principal maximum in the single slit diffraction pattern, then what will be its intensity when the slit width is ... When an unpolarized light of intensity $${{I_0}}$$ is incident on a polarizing sheet, the intensity of the light which does not get transmitted is A plano convex lens of refractive index $$1.5$$ and radius of curvature $$30$$ $$cm$$. Is silvered at the curved surface. Now this lens has been used ... The angle of incidence at which reflected light is totally polarized for reflection from air to glass (refractive index $$n$$) is An electromagnetic wave of frequency $$v=3.0$$ $$MHz$$ passes from vacuum into a dielectric medium with permittivity $$\in = 4.0.$$ Then The maximum number of possible interference maximum for slit-separation equal to twice the wavelength in Young's double-slit experiment is A light ray is incident perpendicularly to one face of a $${90^ \circ }$$ prism and is totally internally reflected at the glass-air interface. If the... To demonstrate the phenomenon of interference, we require two sources which emit radiation To get three images of a single object, one should have two plane mirrors at an angle of The image formed by an objective of a compound microscope is An astronomical telescope has a large aperture to Electromagnetic waves are transverse in nature is evident by If two mirrors are kept at $${60^ \circ }$$ to each other, then the number of images formed by them is Wavelength of light used in an optical instrument are $${\lambda _1} = 4000\mathop A\limits^ \circ$$ and $${\lambda _2} = 5000\mathop A\limits^ \ci... which of the following is used in optical fibres? ## Numerical As shown in the figure, in Young's double slit experiment, a thin plate of thickness$$t=10 \mu \mathrm{m}$$and refractive index$$\mu=1.2$$is inser... A thin cylindrical rod of length$$10 \mathrm{~cm}$$is placed horizontally on the principle axis of a concave mirror of focal length$$20 \mathrm{~cm... Two light waves of wavelengths 800 and$600 \mathrm{~nm}$are used in Young's double slit experiment to obtain interference fringes on a screen placed... In a medium the speed of light wave decreases to $$0.2$$ times to its speed in free space The ratio of relative permittivity to the refractive index o... In a Young's double slit experiment, the intensities at two points, for the path differences$\frac{\lambda}{4}$and$\frac{\lambda}{3}$($\lambda$b... In an experiment for estimating the value of focal length of converging mirror, image of an object placed at $$40 \mathrm{~cm}$$ from the pole of the ... In Young's double slit experiment, two slits $$S_{1}$$ and $$S_{2}$$ are '$$d$$' distance apart and the separation from slits to screen is $$\mathrm{D... A point source of light is placed at the centre of curvature of a hemispherical surface. The source emits a power of$$24 \mathrm{~W}$$. The radius of... In an experiment of measuring the refractive index of a glass slab using travelling microscope in physics lab, a student measures real thickness of th... Unpolarised light is incident on the boundary between two dielectric media, whose dielectric constants are 2.8 (medium$$-1$$) and 6.8 (medium$$-2$$)... As shown in the figure, three identical polaroids P$$_1$$, P$$_2$$and P$$_3$$are placed one after another. The pass axis of P$$_2$$and P$$_3$$are ... An object is placed on the principal axis of convex lens of focal length 10cm as shown. A plane mirror is placed on the other side of lens at a distan... A ray of light is incident from air on a glass plate having thickness$$\sqrt3$$cm and refractive index$$\sqrt2$$. The angle of incidence of a ray i... A convex lens of refractive index 1.5 and focal length 18cm in air is immersed in water. The change in focal length of the lens will be ___________ cm... As shown in the figure, a combination of a thin plano concave lens and a thin plano convex lens is used to image an object placed at infinity. The rad... Two light beams of intensities 4I and 9I interfere on a screen. The phase difference between these beams on the screen at point A is zero and at point... The X-Y plane be taken as the boundary between two transparent media$$\mathrm{M}_{1}$$and$$\mathrm{M}_{2}$$.$$\mathrm{M}_{1}$$in$$Z \geqslant 0$...
An object 'O' is placed at a distance of $$100 \mathrm{~cm}$$ in front of a concave mirror of radius of curvature $$200 \mathrm{~cm}$$ as shown in the...
In an experiment with a convex lens, The plot of the image distance $$\left(v^{\prime}\right)$$ against the object distance ($$\left.\mu^{\prime}\righ... In a Young's double slit experiment, a laser light of 560 nm produces an interference pattern with consecutive bright fringes' separation of 7.2 mm. N... A thin prism of angle$$6^{\circ}$$and refractive index for yellow light$$\left(\mathrm{n}_{\mathrm{Y}}\right) 1.5$$is combined with another prism ... Two beams of light having intensities I and 4I interfere to produce a fringe pattern on a screen. The phase difference between the two beams are$$\pi...
In the given figure, the face $$A C$$ of the equilateral prism is immersed in a liquid of refractive index '$$n$$'. For incident angle $$60^{\circ}$$ ...
The graph between $$\frac{1}{u}$$ and $$\frac{1}{v}$$ for a thin convex lens in order to determine its focal length is plotted as shown in the figure....
A convex lens of focal length 20 cm is placed in front of a convex mirror with principal axis coinciding each other. The distance between the lens and...
The refractive index of an equilateral prism is $$\sqrt 2$$. The angle of emergence under minimum deviation position of prism, in degree, is ________...
In a double slit experiment with monochromatic light, fringes are obtained on a screen placed at some distance from the plane of slits. If the screen ...
A parallel beam of light is allowed to fall on a transparent spherical globe of diameter 30 cm and refractive index 1.5. The distance from the centre ...
In a Young's double slit experiment, an angular width of the fringe is 0.35$$^\circ$$ on a screen placed at 2 m away for particular wavelength of 450 ...
In Young's double slit experiment the two slits are 0.6 mm distance apart. Interference pattern is observed on a screen at a distance 80 cm from the s...
A small bulb is placed at the bottom of a tank containing water to a depth of $$\sqrt7$$ m. The refractive index of water is $${4 \over 3}$$. The area...
A light ray is incident, at an incident angle $$\theta$$1, on the system of tow plane mirrors M1 and M2 having an inclination angle 75$$^\circ$$ betwe...
A ray of light is incident at an angle of incidence 60$$^\circ$$ on the glass slab of refractive index $$\sqrt3$$. After refraction, the light ray eme...
Two identical thin biconvex lens of focal length 15 cm and refractive index 1.5 are in contact with each other. The space between the lenses is filled...
Sodium light of wavelengths 650 nm and 655 nm is used to study diffraction at a single slit of aperture 0.5 mm. The distance between the slit and the ...
The width of one of the two slits in a Young's double slit experiment is three times the other slit. If the amplitude of the light coming from a slit ...
In a Young's double slit experiment, the slits are separated by 0.3 mm and the screen is 1.5 m away from the plane of slits. Distance between fourth b...
Cross-section view of a prism is the equilateral triangle ABC in the figure. The minimum deviation is observed using this prism when the angle of inci...
A source of light is placed in front of a screen. Intensity of light on the screen is I. Two Polaroids P1 and P2 are so placed in between the source o...
An object is placed at a distance of 12 cm from a convex lens. A convex mirror of focal length 15 cm is placed on other side of lens at 8 cm as shown ...
White light is passed through a double slit and interference is observed on a screen 1.5 m away. The separation between the slits is 0.3 mm. The first...
The difference in the number of waves when yellow light propagates through air and vacuum columns of the same thickness is one. The thickness of the a...
A prism of refractive index n1 and another prism of refractive index n2 are stuck together (as shown in the figure). n1 and n2 depend on $$\lambda$$, ...
A ray of light passing through a prism ($$\mu$$ = $$\sqrt 3$$) suffers minimum deviation. It is found that the angle of incidence is double the angle...
An object viewed from a near point distance of 25 cm, using a microscopic lens with magnification '6', gives an unresolved image. A resolved image is ...
A galaxy is moving away from the earth at a speed of 286 kms$$-$$1. The shift in the wavelength of a redline at 630 nm is x $$\times$$ 10$$-$$10 m. Th...
The image of an object placed in air formed by a convex refracting surface is at a distance of 10 m behind the surface. The image is real and is at $$... A deviation of 2$$^\circ$$is produced in the yellow ray when prism of crown and flint glass are achromatically combined. Taking dispersive powers of ... A fringe width of 6 mm was produced for two slits separated by 1 mm apart. The screen is placed 10 m away. The wavelength of light used is 'x' nm. The... A point source of light S, placed at a distance 60cm in front of the centre of a plane mirror of width 50 cm, hangs vertically on a wall. A man walks... The same size images are formed by a convex lens when the object is placed at 20 cm or at 10 cm from the lens. The focal length of convex lens is ____... An unpolarised light beam is incident on the polarizer of a polarization experiment and the intensity of light beam emerging from the analyzer is meas... A Young's double-slit experiment is performed using monochromatic light of wavelength$$\lambda $$. The intensity of light at a point on the screen, w... A prism of angle A = 1o has a refractive index$$\mu $$= 1.5. A good estimate for the minimum angle of deviation (in degrees) is close to$${N \over ...
A beam of electrons of energy E scatters from a target having atomic spacing of 1 $$\mathop A\limits^o$$. The first maximum intensity occurs at $$\th... A compound microscope consists of an objective lens of focal length 1 cm and an eyepiece of focal length 5 cm with a separation of 10 cm. The distance... Orange light of wavelength 6000$$ \times $$10–10 m illuminates a single slit of width 0.6$$ \times $$10–4 m. The maximum possible number of diffra... The distance between an object and a screen is 100 cm. A lens can produce real image of the object on the screen for two different positions between t... In a compound microscope, the magnified virtual image is formed at a distance of 25 cm from the eye-piece. The focal length of its objective lens is 1... When an object is kept at a distance of 30 cm from a concave mirror, the image is formed at a distance of 10 cm from the mirror. If the object is move... An observer can see through a small hole on the side of a jar (radius 15 cm) at a point at height of 15 cm from the bottom (see figure). The hole is a... A light ray enters a solid glass sphere of refractive index$$\mu $$=$$\sqrt 3  at an angle of incidence 60o. The ray is both reflected and refrac...
In a Young's double slit experiment 15 fringes are observed on a small portion of the screen when light of wavelength 500 nm is used. Ten fringes are ...
A point object in air is in front of the curved surface of a plano-convex lens. The radius of curvature of the curved surface is 30 cm and the refract...
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