Wave Optics (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 1 - 5 of 73

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Question number: 1

» Wave Optics » Interference

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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.

4: 1

d.

9: 1

Question number: 2

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

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Assertion-Reason▾

Question

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 but Ꭱ is NOT the correct explanation of Ꭺ

b.

Ꭺ is true but Ꭱ is false

c.

Ꭺ is false but Ꭱ is true

d.

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

Question number: 3

» Wave Optics » Interference

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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.

3I

b.

I

c.

5I

d.

4I

Question number: 4

» Wave Optics » Young's Double Slit Experiment

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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.

30°

b.

0.15°

c.

0.30°

d.

15°

Question number: 5

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

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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.

Remain constant

b.

decrease

c.

Increase

d.

Question does not provide sufficient data or is vague

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