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## Optics

### Physics

#### Previous Years Questions

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An astronomical refracting telescope is being used by an observer to observe planets in normal adjustment. The focal len...
NEET 2022 Phase 2
After passing through a polariser a linearly polarised light of intensity I is incident on an analyser making an angle o...
NEET 2022 Phase 2
If the screen is moved away from the plane of the slits in a Young's double slit experiment, then the :
NEET 2022 Phase 2
During a cloudy day, a primary and a secondary rainbow may be created, then the :
NEET 2022 Phase 2
Two transparent media A and B are separated by a plane boundary. The speed of light in those media are 1.5 $$\times$$ 10...
NEET 2022
When light propagates through a material medium of relative permittivity $$\varepsilon$$r and relative permeability $$\... NEET 2022 A light ray falls on a glass surface of refractive index$$\sqrt3$$, at an angle 60$$^\circ$$. The angle between the ref... NEET 2022 In a Young's double slit experiment, a student observes 8 fringes in a certain segment of screen when a monochromatic li... NEET 2022 A biconvex lens has radii of curvature, 20 cm each. If the refractive index of the material of the lens is 1.5, the powe... NEET 2022 A point object is placed at a distance of 60 cm from a convex lens of focal length 30 cm. If a plane mirror were put per... NEET 2021 A lens of large focal length and large aperture is best suited as an objective of an astronomical telescope since : NEET 2021 A convex lens 'A' of focal length 20 cm and a concave lens 'B' of focal length 5 cm are kept along the same axis with a ... NEET 2021 Find the value of the angle of emergence from the prism. Refractive index of the glass is$$\sqrt 3 $$... NEET 2021 The Brewster's angle ib for an interface should be : NEET 2020 Phase 1 Light with an average flux of 20 W/cm2 falls on a non-reflecting surface at normal incidence having surface area 20 cm2.... NEET 2020 Phase 1 In Young's double slit experiment, if the separation between coherent sources is halved and the distance of the screen ... NEET 2020 Phase 1 A ray is incident at an angle of incidence i on one surface of a small angle prism (with angle of prism A) and emerges n... NEET 2020 Phase 1 Assume that light of wavelength 600 nm is coming from a star. The limit of resolution of telescope whose objective has a... NEET 2020 Phase 1 Two similar thin equi-convex lenses, of focal length f each, are kept coaxially in contact with each other such that the... NEET 2019 Pick the wrong answer in the context with rainbow. NEET 2019 In total internal reflection when the angle of incidence is equal to the critical angle for the pair of media in contact... NEET 2019 In a double slit experiment, when light of wavelength 400 nm was used, the angular width of the first minima formed on a... NEET 2019 An astronomical refracting telescope will have large angular magnification and high angular resolution, when it has an o... NEET 2018 Unpolarised light is incident from air on a plane surface of a material of refractive index$$\mu $$. At a particular an... NEET 2018 In Young’s double slit experiment the separation d between the slits is 2 mm, the wavelength$$\lambda $$of the light u... NEET 2018 An object is placed at a distance of 40 cm from a concave mirror of focal length 15 cm. If the object is displaced throu... NEET 2018 The refractive index of the material of a prism is$$\sqrt 2 $$and the angle of the prism is 30°. One of the two refrac... NEET 2018 Two polaroids P1 and P2 are placed with their axis perpendicular to each other. Unpolarised light$$I$$0 is incident on ... NEET 2017 A thin prism having refracting angle 10o is made of glass of refractive infex 1.42. This prism is combined with another ... NEET 2017 A beam of light from a source L is incident normally on a plane mirror fixed at a certain distance x from the source. Th... NEET 2017 Young's double slit experiment is first performed in air and then in a medium other than air. It is found that 8th brigh... NEET 2017 The ratio of resolving powers of an optical microscope for two wavelength$$\lambda $$1 = 4000$$\mathop A\limits^ \circ...
NEET 2017
A astronomical telescope has objective and eyepiece of focal lengths 40 cm and 4 cm respectively. To view an object 200 ...
NEET 2016 Phase 1
The angle of incidence for a ray of light at a refracting surface of a prism is 45o. The angle of prism is 60o. If the ...
NEET 2016 Phase 1
The intensity at the maximum in a Young's double slit experiment is $$I$$0. Distance between two slits is d = 5$$\lambda... NEET 2016 Phase 1 In a diffraction pattern due to a single slit of width$$a$$, the first minimum is observed at an angle 30o when light ... NEET 2016 Phase 1 Match the corresponding entries of column 1 with column 2. [Where m is the magnification produced by the mirror] .tg {... NEET 2016 Phase 1 A linear aperture whose width is 0.02 cm is placed immediately in front of a lens of focal length 60 cm. The aparture is... NEET 2016 Phase 2 The interference pattern is obtained with two coherent light sources of intensity ratio n. In the interference pattern,... NEET 2016 Phase 2 An air bubble in a glass slab with refractive index 1.5 (near normal incidence) is 5 cm deep when viewed from one surfac... NEET 2016 Phase 2 A person can see clearly objects only when they lie between 50 cm and 400 cm from his eyes . In order to increase the ma... NEET 2016 Phase 2 Two identical glass ($$\mu $$g = 3/2) equiconvex lenses of focal length$$f$$each are kept in contact. The space betwee... NEET 2016 Phase 2 Two slits in Young's experiment have widths in the ratio 1 : 25. The ratio of intensity at the maxima and minima in the ... AIPMT 2015 The refracting angle of a prism is A, and refractive index of the material of the prism is cot (A/2). The angle of minim... AIPMT 2015 Cancelled Paper In a double slit experiment, the two slits are 1 mm apart and the screen is placed 1 m away. A monochromatic light of wa... AIPMT 2015 Cancelled Paper In an astronomical telescope in normal adjustment a straight black line of length L is drawn on inside part of objective... AIPMT 2015 Two identical thin plano-convex glass lenses (refractive index 1.5) each having radius of curvature of 20 cm are placed ... AIPMT 2015 Cancelled Paper For a parallel beam of monochromatic light of wavelength '$$\lambda $$' , diffraction is produced by a single slit whose... AIPMT 2015 Cancelled Paper A beam of light consisting of red, green and blue colours is incifent on a right angled prism. The refractive index of t... AIPMT 2015 At the first minimum adjacent to the central maximum of a single-slit diffraction pattern, the phase difference between ... AIPMT 2015 If the focal length of objective lens is increased then magnifying power of AIPMT 2014 The angle of a prism is A. One of its refracting surfaces is silvered. Light rays falling at an angle of incidence 2 A o... AIPMT 2014 In the Young's double slit experiment, the intensity of light at a point on the screen where the path difference$$\lamb...
AIPMT 2014
A beam of light of $$\lambda = 600$$ nm from a distant source falls on a single slit 1 mm wide and the resulting diffra...
AIPMT 2014
The reddish appearance of the sun at sunrise and sunset is due to
NEET 2013 (Karnataka)
A parallel beam of light of wavelength $$\lambda$$ is incident normally on a narrow slit. A diffraction pattern formed ...
NEET 2013 (Karnataka)
Two plane mirrors are inclined at 70o. A ray incident on one mirror at angle, $$\theta$$ after reflection falls on seco...
NEET 2013 (Karnataka)
A parallel beam of fast moving electrons is incident normally on a narrow slit. A fluorescent screen is placed at a larg...
NEET 2013
In Young's double slit experiment the distance between the slits and the screen is doubled. The separation between the s...
NEET 2013 (Karnataka)
In Young's double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths $${\lambda... NEET 2013 For a normal eye, the cornea of eye provides a converging power of 40 D and the least converging power of the eye lens b... NEET 2013 A plano convex lens fits exactly into a plano concave lens. Their plane surfaces are parallel to each other. If lenses a... NEET 2013 A rod of length 10 cm lies along the principal axis of a concave mirror of focal length 10 cm in such a way that its enf... AIPMT 2012 Mains The magnifying power of a telescope is 9. When it is adjusted for parallel rays the distance between the objective and e... AIPMT 2012 Prelims For the angle of minimum deviation of a prism to be equal to its refracting angle, the prism must be made of a material ... AIPMT 2012 Mains A concave mirror of focal length$$f$$1 is placed at a distance of d from a convex lens of focal length$$f$$2. A beam o... AIPMT 2012 Prelims When a biconvex lens of glass having refractive index 1.47 is dipped in a liquid, it acts as a plane sheet of glass. Thi... AIPMT 2012 Prelims A ray of light is incident at an angle of incidence i, on one face of a prism of angle A (assumed to be small ) and emer... AIPMT 2012 Prelims A thin prism of angle 15o made of glass of refractive index$$\mu $$1 = 1.5 is combined with another prism of glass of r... AIPMT 2011 Mains A biconvex lens has a radius of curvature of magnitude 20 cm. Which one of the following options describe best the image... AIPMT 2011 Prelims A converging beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point ... AIPMT 2011 Mains Which of the following is not due to total internal reflection ? AIPMT 2011 Prelims A rays of light is incident on a 60o prism at the minimum deviation position. The angle of refraction at the first face ... AIPMT 2010 Mains The speed of light in media M1 and M2 are 1.5$$ \times $$108 m/s and 2.0$$ \times $$108 m/s respectively. A ray of l... AIPMT 2010 Mains A ray of light travelling in a transparent medium of refractive index$$\mu $$, falls on a surface separating the medium... AIPMT 2010 Prelims A lens having focal length f and aperture of diameter d forms an image of intensity I. Aperture of diameter$${d \over 2...
AIPMT 2010 Prelims
A boy is trying to start a fire by focusing sunlight on a piece of paper using an equiconvex lens of focal length 10 cm....
AIPMT 2008
Two thin lenses of focal lengths f1 and f2 are in contact and coaxial. The power of the combination is ...
AIPMT 2008
The frequency of a light wave in a material is 2 $$\times$$ 1014 Hz and wavelength is 5000 $$\mathop A\limits^ \circ ... AIPMT 2007 A small coin is resting on the bottom of a beaker filled with liquid . A ray of light from the coin travels upto the sur... AIPMT 2007 A convex lens and a concave lens, each having same focal length of 25 cm, are put in contact to form a combination of le... AIPMT 2006 A microscope is focussed on a mark on a piece of paper and then a slab of glass of thickness 3 cm and refractive index 1... AIPMT 2006 The angular resolution of a 10 cm diameter telescope at a wavelength of 5000$$\mathop A\limits^ \circ $$is of the ord... AIPMT 2005 A beam of light composed of red and green ray is incident obliquely at a point on the face of rectangular glass slab. Wh... AIPMT 2004 The refractive index of the material of a prism is$$\sqrt 2 $$and its refracting angle is 30o. One of the refracting s... AIPMT 2004 A telescope has an objective lens of 10 cm diameter and is situated at a distance of one kilometer from two objects. The... AIPMT 2004 A convex lens is dipped in a liquid whose refractive index is equal to the refractive index of the lens. Then its focal ... AIPMT 2003 An equiconvex lens is cut into two halves along (i) XOX' and (ii) YOY' as shown in the figure. Let$$f,f',f''$$... AIPMT 2003 Diameter of human eye lens is 2 mm. What will be the minimum distance between two points to resolve them, which are situ... AIPMT 2002 For the given incident ray as shown in figure, the condition of total internal refraction of this ray the required refra... AIPMT 2002 A bulb is located on a wall. Its image is to be obtained on a parallel wall with the help of convex lens. The lens is pl... AIPMT 2002 A ray of light travelling in air have wavelength$$\lambda $$, frequency n, velocity v and intensity$$I$$. If this ray ... AIPMT 2001 Optical fibre are based on AIPMT 2001 A disc is placed on a surface of pond which has refractive index 5/3. A source of light is placed 4 m below the surface ... AIPMT 2001 Rainbow is formed due to AIPMT 2000 For a plano convex lens ($$\mu $$= 1.5) has radius of curvature 10 cm. It is silvered on its plane surface. Find focal ... AIPMT 2000 A tall man of height 6 feet, want to see his full image. Then required minimum length of the mirror will be AIPMT 2000 A bubble in glass slab ($$\mu  = 1.5) when viewed from one side appears at 5 cm and 2 cm from other side, then thickne...
AIPMT 2000

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