# Ray Optics-Deviation and Dispersion of Light by a Prism (NEET Physics): Questions 1 - 4 of 17

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## Question number: 1

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

MCQ▾

### Question

A crown glass prism of angle 5° is to be combined with a flint glass prism in such a way that the mean ray passes undeviated. Find the angle of the flint glass prism needed and the angular dispersion produced by the combination when white light goes through it. Refractive indices for red, yellow and violet light are 1.514, 1.517 and 1.523 respectively for crown glass and 1.613, 1.620 and 1.632 for flint glass.

### Choices

Choice (4) Response

a.

4.2°, 0.0138°

b.

4.4°, 0.0218°

c.

1.2°, 0.0348°

d.

4.2°, 0.0348°

## Question number: 2

» 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: 3

» 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.

d.

## Question number: 4

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

MCQ▾

### Question

A prism of dispersive power 0.021 and refractive index 1.53 form an achromatic combination with prism of angle 4.2° and dispersive power 0.045 having refractive index 1.65. Find the resultant deviation.

### Choices

Choice (4) Response

a.

4.18°

b.

2.16°

c.

1.12°

d.

3.12°

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