Ray Optics (JEE (Based on NTA Guidelines-IIT Engg.) Advanced Physics): Questions 1 - 2 of 21

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Question number: 1

» Ray Optics » Total Internal Reflection

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Appeared in Year: 2014

MCQ▾

Question

A point source is placed at the bottom of a transparent block of height and refractive index . It is immersed in a lower refractive index liquid as shown in the figure. It is found that the light emerging from the block to the liquid forms a circular bright spot of diameter on the top of the block. The refractive index of the liquid is:

A source S at the bottom of block

A Source S at the Bottom of Block

In figure, a source S at the bottom of block is shown in figure.

Choices

Choice (4) Response

a.

1.21

b.

1.42

c.

1.30

d.

1.36

Question number: 2

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

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Appeared in Year: 2017

MCQ▾

Question

For an isosceles prism of angle and refractive index , it is found that the angle of minimum deviation . Which of the following options is/are correct?

Choices

Choice (4) Response

a.

At minimum deviation, the incident angle and the refracting angle at the first refracting surface are related by

b.

For this prism, the emergent ray at the second surface will be tangential to the surface when the angle of incidence at the first surface is

c.

For the angle of incidence , the ray inside the prism is parallel to the prism is parallel to the base of the prism.

d.

All b. , c. and a. are correct

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