Ray Optics (NEET Physics): Questions 12 - 16 of 102

Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2099 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. View Sample Explanation or View Features.

Rs. 550.00 or

Question number: 12

» Ray Optics » Reflection and Refraction of Light » Smooth Surface

Assertion-Reason▾

Assertion (Ꭺ)

The mirrors used in search lights are parabolic and not concave spherical.

Reason (Ꭱ)

In a concave spherical mirror the image formed is always virtual.

Choices

Choice (4) Response
a. Both Ꭺ and Ꭱ are false
b. Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ
c. Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ
d. Ꭺ is true but Ꭱ is false

Question number: 13

» Ray Optics » Deviation and Dispersion of Light by a Prism

MCQ▾

Question

The refractive indices of material of a prism for blue and red colors are 1.532 and 1.514 respectively. Calculate angular dispersion produced by the prism if angle of prism is 8°.

Choices

Choice (4) Response
a.

0.133°

b.

0.111°

c.

0.122°

d.

0.144°

Question number: 14

» Ray Optics » Deviation and Dispersion of Light by a Prism

MCQ▾

Question

A ray of light is incident at an angle of 60° on one face of a prism which has an angle of 30°. The ray emerging out of the prism makes an angle of 30° with the incident ray. Calculate the refractive index of the material of the prism,

Choices

Choice (4) Response
a.

2

b.

1

c.

3

d.

2

Question number: 15

» Ray Optics » Reflection and Refraction of Light » Spherical Surface

MCQ▾

Question

Two mirrors are inclined at an angle of 50°. Then what is the number of images formed for an object placed in between the mirrors?

Choices

Choice (4) Response
a.

7

b.

1

c.

3

d.

6

Question number: 16

» Ray Optics » Snell's Law

MCQ▾

Question

A light beam is travelling from Region I to Region IV (Refer Figure). The refractive index in Regions I, II, III and IV are no,n02,n06andn08 respectively. The angle of incidence θ for which the beam just misses entering Region IV is,

Beam Travelling from Region I to Region IV

Beam Travelling From Region I to Region IV

In figure beam is travelling from region I to region IV. n0, n02, n06 andn08 are the refractive indexes of region I, II, III and IV respectively.

Choices

Choice (4) Response
a.

sin1(34)

b.

sin1(18)

c.

sin1(13)

d.

sin1(14)

Sign In