Wave Optics (NEET (National Eligibility cum Medical Entrance Test) 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

» Wave Optics » Diffraction Due to a Single Slit Width of Central Maximum

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 Equation .

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

» Wave Optics » Diffraction Due to a Single Slit Width of Central Maximum

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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