# NEET Physics: Questions 983 - 987 of 2142

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## Question number: 983

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: 984

MCQ▾

### Question

In an EM wave the amplitude of electric field is 10 V/m. The frequency of wave is 5 x 10 4 Hz. The wave is propagating along Z-axis. Then the average energy density of magnetic field is-

### Choices

Choice (4) Response

a.

2 x 10 -8 J/m 3

b.

2.21 x 10 -8 J/m 3

c.

2.21 x 10 -10 J/m 3

d.

2 x 10 -10 J/m 3

## Question number: 985

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: 986

MCQ▾

### Question

Which of the following pairs of space and time varying E and B fields would generate a plane electromagnetic wave travelling in (-Z) direction?

### Choices

Choice (4) Response

a.

E X, B Z

b.

E Y, B X

c.

E Z, B Y

d.

E X, B Y

## Question number: 987

» 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

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