Wave Optics (NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics): Questions 32 - 36 of 64

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Question number: 32

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

MCQ▾

Question

In Fresnel’s biprism experiment distance of m th bright fringe from zeroth order fringe will be –

Choices

Choice (4) Response

a.

b.

c.

d.

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Question number: 33

» Wave Optics » Wavefront

MCQ▾

Question

Red light of wavelength 6500 Å from a distant source falls on a slit 0.5 mm wide. What is the distance between two dark bands on each side of central bright band of diffraction pattern observed on a screen placed 1.8 m from the slit?

Choices

Choice (4) Response

a.

4.68 ×10 -3 mm

b.

4.68 × 10 -3 nm

c.

4.68 × 10 -3 cm

d.

4.68 × 10 -3 m

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Question number: 34

» Wave Optics » Young's Double Slit Experiment

MCQ▾

Question

In Young’s experiment the wavelength of red light is 7.5 × 10 -5 cm. and that of blue light 5.0 × 10 -5 cm. The value of n for which (n + l) th blue bright band coincides with n th red bright band is-

Choices

Choice (4) Response

a.

8

b.

4

c.

1

d.

2

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Question number: 35

» Wave Optics » Interference

MCQ▾

Question

The intensities of two light sources are I and 9I respectively. If the phase difference between the waves emitted by them is π then the resultant intensity at the point of observation will be –

Choices

Choice (4) Response

a.

3I

b.

10I

c.

82I

d.

4I

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Question number: 36

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

MCQ▾

Question

What will be the angle of diffraction for the first minimum due to Fraunhoffer diffraction with sources of light of wave length 550 nm and slit width 0.55 mm?

Choices

Choice (4) Response

a.

l rad

b.

0.01 rad

c.

0.1 rad

d.

0.001 rad

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