# Ray Optics · Physics · COMEDK

Start Practice## MCQ (Single Correct Answer)

COMEDK 2024 Evening Shift

A telescope has an objective of focal length $$60 \mathrm{~cm}$$ and eyepiece of focal length $$5 \mathrm{~cm}$$. The telescope is focussed for least ...

COMEDK 2024 Evening Shift

Figure below shows a lens of refractive index, $$\mu=1.4$$. $$C_1$$ and $$C_2$$ are the centres of curvature of the two faces of the lens of radii of ...

COMEDK 2024 Evening Shift

When a biconvex lens of glass of refractive index 1.5 is dipped in a liquid, it acts like a plane sheet of paper.
This means the refractive index of t...

COMEDK 2024 Evening Shift

A hollow prism is filled with water and placed in air. It will deviate the incident rays

COMEDK 2024 Morning Shift

In the normal adjustment of an astronomical telescope, the objective and eyepiece are $$32 \mathrm{~cm}$$ apart. If the magnifying power of the telesc...

COMEDK 2024 Morning Shift

When a particular wave length of light is used the focal length of a convex mirror is found to be $$10 \mathrm{~cm}$$. If the wave length of the incid...

COMEDK 2024 Morning Shift

For a $$30^{\circ}$$ prism when a ray of light is incident at an angle $$60^{\circ}$$ on one of its faces, the emergent ray passes normal to the other...

COMEDK 2024 Morning Shift

A ray of light travelling through a medium of refractive index $$\frac{5}{4}$$ is incident on a glass of refractive index $$\frac{3}{2}$$. Find the an...

COMEDK 2023 Morning Shift

An air bubble in water $$\left(\mu=\frac{4}{3}\right)$$ is shown in figure. The apparent depth of the image of the bubble in plane mirror viewed by ob...

COMEDK 2023 Morning Shift

A fish in water (refractive index $$n$$ ) looks at a bird vertically above in the air. If $$y$$ is the height of the bird and $$x$$ is the depth of th...

COMEDK 2023 Evening Shift

The critical angle of a medium having the refractive index $$\sqrt2$$ is :

COMEDK 2023 Evening Shift

When angle of incidence on one face of the equilateral glass prism is $$3 / 4^{\text {th }}$$ of the angle of prism, the ray of light undergoes minimu...

COMEDK 2023 Evening Shift

A person has a normal near point $$25 \mathrm{~cm}$$. What is the magnifying power of the simple microscope he used, if the focal length of the convex...

COMEDK 2023 Evening Shift

A lens of power $$+1 \mathrm{D}$$ is made in contact with another lens of power $$-2 \mathrm{D}$$ the combination will then act as a:

COMEDK 2023 Evening Shift

What will be change in wave length, if a light of wave length $$600 \mathrm{~nm}$$ travels from air enters a medium of refractive index 1.5 and contin...

COMEDK 2022

A point object is placed on the optic axis of a convex lens of focal length $$f$$ at a distance of $$2f$$ to the left of it. The diameter of the lens ...

COMEDK 2022

A plane glass mirror of thickness 3 cm of material of $$\mu=\frac{3}{2}$$ is silvered on the black surface. When a point object is placed 9 cm from th...

COMEDK 2021

Two converging lenses of focal length 20 cm and 40 cm are placed in contact. The effective power of the combination is

COMEDK 2021

The magnifying power of a telescope is 9. When it is adjusted for parallel rays, the distance between the objective and eyepiece is 20 cm. The focal l...

COMEDK 2020

A convex lens is made of 3 layers of glass of 3 different materials as in the figure.
A point object is placed on its axis. The number
of images of t...

COMEDK 2020

A ray of light suffers minimum deviation in
equilateral prism P. Additional prisms Q and R
of identical shape and of same material as that of
P are no...