iCON Education - Ray Optics AP-EAPCET Test

Question 1: Palette 1/24

AP-EAPCET 2025 MCQ

A ray of light incidents at an angle of $60^{\circ}$ on the first face of a prism. The angle of the prism is $30^{\circ}$ and its second face is silvered. If the light ray inside the prism retraces its path after reflection from the second face, then the refractive index of the material of the prism is

$\frac{2}{\sqrt{3}}$

$\frac{3}{2}$

$\sqrt{2}$

$\sqrt{3}$

Question 2: Palette 2/24

AP-EAPCET 2025 MCQ

When an object is placed infront of a convex mirror at a distance ' $u$ ' from the pole of the mirror such that the size of the image is ' $n$ ' times that of the object. Then, the object distance ' $u=$

$\frac{f}{n^2}-n f$

$n f-\frac{f}{n}$

$f-\frac{f}{n}$

$f+\frac{f}{n^2}$

Question 3: Palette 3/24

AP-EAPCET 2025 MCQ

The ratio of the focal lengths of a convex lens when kept in air and when it is immersed in a liquid is $1: 2$. If the refractive index of the material of the lens is 1.5 , then the refractive index of the liquid is

1.20

1.30

1.25

1.35

Question 4: Palette 4/24

AP-EAPCET 2025 MCQ

If the least distance of distinct vision for a boy is 35 cm , then the lens to be used by the boy for correcting the defect of his eye is

convex lens of focal length 35 cm

concave lens of focal length 35 cm

convex lens of focal length 87.5 cm

concave lens of focal length 87.5 cm

Question 5: Palette 5/24

AP-EAPCET 2025 MCQ

A light ray falls on a rectangular glass slab as shown in the figure. If total internal reflection occurs at the vertical face of the slab at point $B$, the refractive index of glass is

AP EAPCET 2025 - 23rd May Morning Shift Physics - Ray Optics Question 3 English

$\sqrt{\frac{3}{2}}$

$\frac{(\sqrt{3+1})}{2}$

$\frac{(\sqrt{2+1})}{2}$

$\frac{\sqrt{5}}{2}$

Question 6: Palette 6/24

AP-EAPCET 2025 MCQ

Images of same size are formed by a convex lens when an object is placed either at 20 cm or 10 cm distance from the lens. The focal length of the lens is

12 cm

40 cm

18 cm

15 cm

Question 7: Palette 7/24

AP-EAPCET 2025 MCQ

A light ray incidents on an equilateral prism made of material of refractive index $\sqrt{3}$. Inside the prism, if the light ray moves parallel to the base of the prism, then the angle of incidence of the light ray is

$30^{\circ}$

$45^{\circ}$

$75^{\circ}$

$60^{\circ}$

Question 8: Palette 8/24

AP-EAPCET 2025 MCQ

Two thin convex lenses are kept in contact coaxially. If the focal length of the combination of the lenses is 4 cm and sum of the focal lengths of the two lenses is 18 cm , then the focal length of the lens of low power is

8 cm

10 cm

6 cm

12 cm

Question 9: Palette 9/24

AP-EAPCET 2025 MCQ

If the far point of a short sighted person is 400 cm , then the power of the lens required to enable him to see very distant objects clearly is

-0.5 D

+0.5 D

+025 D

-025 D

Question 10: Palette 10/24

AP-EAPCET 2024 MCQ

When a convex lens is immersed in two different liquids of refractive indices 1.25 and 1.5 , the ratio of the focal lengths of the lens is $5: 16$. The refractive index of the material of the lens is

1.55

1.5

1.65

1.6

Question 11: Palette 11/24

AP-EAPCET 2024 MCQ

When a convex lens is immersed in a liquid of refractive index equal to $80 \%$ of the refractive index of the material of the lens. The focal length of the lens increases by $100 \%$. The refractive index of the liquid is

1.27

1.2

1.33

1.4

Question 12: Palette 12/24

AP-EAPCET 2024 MCQ

A person can see objects clearly when they lie between 40 cm and 400 cm from his eye. In order to increase the maximum distance of distant vision to infinity the type of lens and power of correction lens required respectively, are

convex, 0.25 D

concave, -0.25 D

concave, -0.5 D

concave, 0.5 D

Question 13: Palette 13/24

AP-EAPCET 2024 MCQ

The focal length of the objective lens of a telescope is 30 cm and that of its eye lens is 3 cm . It is focussed on a scale at a distance 2 m from it. The distance of objective lens from eye lens to see the clear image is

38.3 cm

48.3 cm

58.3 cm

22.5 cm

Question 14: Palette 14/24

AP-EAPCET 2024 MCQ

A ray of light travels from an optically denser to rare medium. The critical angle for the media is $C$. The maximum possible deviation of the ray will be

$\frac{\pi}{2}-C$

2 C

$\pi-2 C$

$\pi^{\circ}-C$

Question 15: Palette 15/24

AP-EAPCET 2024 MCQ

The angle of polarisation for a medium with respect to air is $60^{\circ}$. The critical angle of this medium with respect to air is

$\sin ^{-1} \sqrt{3}$

$\tan ^{-1} \sqrt{3}$

$\cos ^{-1} \sqrt{3}$

$\sin ^{-1} \frac{1}{\sqrt{3}}$

Question 16: Palette 16/24

AP-EAPCET 2024 MCQ

An object is placed at a distance of 18 cm in front of a mirror. If the image is formed at a distance of 4 cm on the other side, then focal length, nature of the mirror and nature of image are respectively

3.14 cm , concave mirror and real image

3.14 cm , convex mirror and real image

5.14 cm , convex mirror and virtual image

5.14 cm , concave mirror and virtual image

Question 17: Palette 17/24

AP-EAPCET 2024 MCQ

An object lying 100 cm inside water is viewed normally from air. If the refractive index of water is $\frac{4}{3}$, then the apparent depth of the object is

100 cm

50 cm

25 cm

75 cm

Question 18: Palette 18/24

AP-EAPCET 2024 MCQ

The minimum deviation produced by a hollow prism filled with a certain liquid is found to be $30^{\circ}$. The light ray is also, found to be refracted at an angle of $30^{\circ}$. Then, the refractive index of the liquid is

$\sqrt{2}$

$\sqrt{3}$

$\sqrt{\frac{3}{2}}$

$\frac{3}{2}$

Question 19: Palette 19/24

AP-EAPCET 2024 MCQ

The focal length of a thin converging lens in air is 20 cm . When thefens is immersed in a liquid, it behaves like a concave lens of power 1 D . If the refractive index of the material of the lens is 1.5 . The refractive index of the liquid is

$5 / 3$

$4 / 3$

$5 / 4$

$7 / 4$

Question 20: Palette 20/24

AP-EAPCET 2022 MCQ

A needle is lying at the bottom of a water tank of height 12 cm. The apparent depth of the needle measured by a microscope is 9 cm . If the water is replaced by a liquid of refractive index of 1.5 of same height, the distance through which the microscope has to be moved to focus the needle again is

1.2 cm

1.1 cm

1 cm

1.33 cm

Question 21: Palette 21/24

AP-EAPCET 2022 MCQ

The radii of curvature of a double convex lens are 4 cm and 8 cm . If the refractive index of the material of the lens is 1.5 , the focal length of the lens is nearly.

16 cm

12.11 cm

7.33 cm

5.33 cm

Question 22: Palette 22/24

AP-EAPCET 2022 MCQ

A ray is incident from a medium of refractive index 2 into a medium of refractive index 1. The critical angle is

$30^\circ$

$60^\circ$

$45^\circ$

$90^\circ$

Question 23: Palette 23/24

AP-EAPCET 2021 MCQ

Assertion (A) The focal length of lens does not change when red light is replaced by blue light.

Reason (R) The focal length of lens does not depend on colour of light used.

Both $A$ and $R$ are true and $R$ is a correct explanation for $A$.

Both $A$ and $R$ are true but $R$ is not a correct explanation for $\mathrm{A}$.

$A$ is true, $R$ is false.

Both $A$ and $R$ are false.

Question 24: Palette 24/24

AP-EAPCET 2021 MCQ

Light of wavelength $300 \mathrm{~nm}$ in medium $A$ enters into medium $B$ through a plane surface. If the frequency of light is $5 \times 10^{14} \mathrm{~Hz}$ and the ratio of speed in medium $A$ to that in medium $B$ is $4 / 5$, the absolute refractive index of medium $B$ is

1.6

1.5

1.3

1.45