# Wave Optics (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 1 - 5 of 64

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## Question number: 1

» Wave Optics » Interference

MCQ▾

### Question

The intensity ratio of two waves is 9: 1. These waves produce the event of interference. The ratio of maximum to minimum intensity will be

### Choices

Choice (4) Response

a.

1: 4

b.

1: 9

c.

9: 1

d.

4: 1

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## Question number: 2

Assertion-Reason▾

### Assertion (Ꭺ)

If a plane glass slab is placed on the letters of different colors all the letters appear to be raised up to the same height.

### Reason (Ꭱ)

Different colors have different wavelengths.

### Choices

Choice (4) Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Ꭺ is false but Ꭱ is true

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are false

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## Question number: 3

» Wave Optics » Interference

MCQ▾

### Question

Consider interference between waves from two sources of intensities are I & 4I. Find intensities at points where the phase difference is .

### Choices

Choice (4) Response

a.

I

b.

4I

c.

3I

d.

5I

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## Question number: 4

» Wave Optics » Young's Double Slit Experiment

MCQ▾

### Question

In Young’s double slit experiment the two slits are illuminated by light of wavelength 5890 Å and the angular separation between the fringes obtained on the screen is 0.2°. If the whole apparatus is immersed in water then the angular fringe width will be, if the refractive index of water is 4/3?

### Choices

Choice (4) Response

a.

0.15°

b.

15°

c.

30°

d.

0.30°

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## Question number: 5

MCQ▾

### Question

In Fresnel diffraction, if the distance between the disc and the screen is decreased, the intensity of central bright spot will

### Choices

Choice (4) Response

a.

Increase

b.

Remain constant

c.

decrease

d.

All of the above

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