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JEE • PHYSICS • RAY OPTICS

Ray optics practice · Easy

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Practice format and chapter quiz

These sets use single-correct-answer MCQs. They do not cover every JEE Main or JEE Advanced question format and are not full-length mock papers.

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1 Easy

1 of 17

Understanding +4 | -1

Given below are two statements:

Statement I: When the white light passed through a prism, the red light bends lesser than yellow and violet.

Statement II: The refractive indices are different for different wavelengths in dispersive medium.
In the light of the above statements, choose the correct answer from the options given below:

View answer and explanation

Correct option: A

Both Statement I and Statement II are true

Option A (Both Statement I and Statement II are true) is correct because red light bends less than yellow and violet, and refractive indices vary with wavelength in a dispersive medium.

2 Easy

2 of 17

Application +4 | -1

Critical angle of incidence for a pair of optical media is

45^{\circ}

. The refractive indices of first and second media are in the ratio:

View answer and explanation

Correct option: A

\sqrt{2}: 1

Option A (

\sqrt{2}: 1

) is correct because the ratio of refractive indices is the reciprocal of the sine of the critical angle, which is sin(45) = 1/sqrt(2).

3 Easy

3 of 17

Application +4 | -1

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 deviated through an angle of

15^{\circ}

from its original direction. The refractive index of the medium is

View answer and explanation

Correct option: C

1.414

Option C (

1.414

) is correct because it is calculated using Snell's law, considering the angle of incidence and the angle of refraction.

4 Easy

4 of 17

Analyzing +4 | -1

Mimimum distance between object and image formed by concave mirror of focal length

f

can be:

View answer and explanation

Correct option: D

zero

The minimum distance between the object and image formed by a concave mirror is zero (Option D) when the object is placed at the center of curvature.

5 Easy

5 of 17

Understanding +4 | -1

The passenger side-view mirror on an automobile often has the notation. "Objects seen in mirror are closer than they appear". Is the image really farther away than the object?

View answer and explanation

Correct option: B

No, the image is smaller and closer than the object

Option B is correct because the convex mirror used in passenger side-view mirrors creates a smaller, upright, and virtual image that appears closer than the actual object.

6 Easy

6 of 17

Understanding +4 | -1

Statement-I: The twinkling of star is due to reflection of light.

Statement-II: The velocity of light changes while going from one medium to the other.

View answer and explanation

Correct option: D

If Statement-I is false but Statement-II is true.

The correct answer is D (If Statement-I is false but Statement-II is true) because twinkling is due to refraction, and the speed of light changes between media.

7 Easy

7 of 17

Understanding +4 | -1

Statement I : Endoscopy involves use of optical fibres to study intemal organs.

Statement II : Optical fibres are based on the phenomenon of total internal reflection.

View answer and explanation

Correct option: A

Statement I is true, Statement II is true; Statement II is the correct explanation for Statement 1

Option A (Statement I is true, Statement II is true; Statement II is the correct explanation for Statement 1) is correct because endoscopy uses optical fibers which rely on total internal reflection.

8 Easy

8 of 17

Remembering +4 | -1

The focal length of plane mirror is :

View answer and explanation

Correct option: B

\infty

Option B (

\infty

) is correct because a plane mirror has an infinite radius of curvature, resulting in an infinite focal length.

9 Easy

9 of 17

Understanding +4 | -1

A plane mirror reflects a beam of light to from a real image. The incident beam is :

View answer and explanation

Correct option: B

convergent

Option B (convergent) is correct because a plane mirror can form a real image only if the incident beam is convergent.

10 Easy

10 of 17

Application +4 | -1

In a convex mirror having radius of curvature

30 \mathrm{~cm}

the height of image is half the object height. What will be the object (in

\mathrm{cm}

) distance?

View answer and explanation

Correct option: A

Option A (15) is correct because it is calculated using the mirror formula and the magnification formula for a convex mirror.

11 Easy

11 of 17

Remembering +4 | -1

Total internal reflection can take place only if

View answer and explanation

Correct option: B

light goes from optically denser medium to rarer medium

Option B (light goes from optically denser medium to rarer medium) is correct because total internal reflection occurs when light travels from a denser to a rarer medium at an angle greater than the critical angle.

12 Easy

12 of 17

Application +4 | -1

A small telescope has an objective of focal length 140 cm and an eye piece of focal length 5.0 cm. The
magnifying power of telescope for viewing a distant object is:

View answer and explanation

Correct option: A

Option A (28) is correct because the magnifying power of a telescope is the ratio of the objective focal length to the eyepiece focal length.

13 Easy

13 of 17

Understanding +4 | -1

To obtain the maximum magnification with a simple microscope, where should the eye be placed?

View answer and explanation

Correct option: A

Close to the lens

The correct answer is A (Close to the lens) because the magnification of a simple microscope is maximum when the eye is placed close to the lens.

14 Easy

14 of 17

Application +4 | -1

A biconvex lens of refractive index 1.5 has a focal length of

20 {~cm}

in air. Its focal length when immersed in a liquid of refractive index 1.6 will be :

View answer and explanation

Correct option: C

-160 {~cm}

Option C (

-160 {~cm}

) is correct because it applies the lens maker's formula to calculate the focal length in a liquid, considering the refractive indices of the lens and the liquid.

15 Easy

15 of 17

Remembering +4 | -1

For which colour, velocity of light is maximum in glass:

View answer and explanation

Correct option: C

Red

Option C (Red) is correct because the velocity of light in a medium is inversely proportional to the refractive index, and red light has the lowest refractive index in glass compared to other colors.

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16 Easy

16 of 17

Understanding +4 | -1

Which of the following statement is correct?

View answer and explanation

Correct option: A

In primary rainbow, observer sees red colour on the top and violet on the bottom

Option A is correct because in a primary rainbow, red is seen at the top and violet at the bottom due to the angle of refraction and dispersion.

17 Easy

17 of 17

Understanding +4 | -1

Assertion: Dispersion of light occurs because velocity of light in a material depends upon its colour.
Reason: The dispersive power depends only upon the material of the prism, not upon the refractive angle of the prism.

View answer and explanation

Correct option: B

If both Assertion and Reason are true, but Reason is not the correct explanation of Assertion

Option B is correct because both the assertion and the reason are true, but the reason does not explain the assertion.

Revision notes and key takeaways

Review RAY OPTICS in your textbook or class notes, then use this set to check your understanding.

Key Takeaways

✓ This set contains 17 single-correct-answer MCQs on RAY OPTICS.
✓ Try each question before opening its answer. Read the explanation where one is available.
✓ Sign in to save submitted answers. Revisit incorrect answers alongside your textbook or class notes.

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