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It is found that when waves from two identical coherent sources superpose at a certain point, the resultant intensity is equal to the intensity of one wave only. This means that the phase difference between the two waves at that point is,

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Important Questions on Interference and Diffraction of Light

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JEE Advanced

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 8 - Interference and Diffraction of Light>Objective Problems [Level 1]>Q 18

Monochromatic green light of wavelength

5 \times 10^{- 7} m

illuminates a pair of slits

1 mm

apart. The separation between bright lines on the interference pattern formed on a screen

2 m

away is,

EASY

JEE Advanced

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 8 - Interference and Diffraction of Light>Objective Problems [Level 1]>Q 20

In a double-slit experiment, for light of which colour will the fringe width be minimum?

HARD

JEE Advanced

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 8 - Interference and Diffraction of Light>Objective Problems [Level 1]>Q 21

A thin mica sheet of thickness

2 \times 10^{- 6} m

and refractive index

(μ = 1.5)

is introduced in the path of light from upper slit. The wavelength of the wave used is

5000 \overset{\circ}{A}

. The central bright maximum will shift,

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JEE Advanced

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 8 - Interference and Diffraction of Light>Objective Problems [Level 1]>Q 22

In Young's double slit experiment, the fringe width will remain same if (

D =

distance between the screen and the plane of slits,

d =

separation between two slits and

λ =

wavelength of light used),

MEDIUM

JEE Advanced

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 8 - Interference and Diffraction of Light>Objective Problems [Level 1]>Q 23

In Young's double slit experiment, instead of taking slits of equal width, one slit is made twice as wide as the other. Then, in the interference pattern,

MEDIUM

JEE Advanced

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 8 - Interference and Diffraction of Light>Objective Problems [Level 1]>Q 24

When a thin transparent plate of thickness

t

and refractive index

μ

is placed in the path of one of the two interfering waves of light, then the path difference between the two waves is,

HARD

JEE Advanced

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 8 - Interference and Diffraction of Light>Objective Problems [Level 1]>Q 25

In Young's double slit experiment, an interference pattern is obtained for,

λ = 6000 \overset{\circ}{A}

, coming from two coherent sources

S_{1}

and

S_{2}

. At a certain point

P

on the screen, third dark fringe is formed. Then, the path difference

S_{1} P - S_{2} P

in microns is,

EASY

JEE Advanced

IMPORTANT

Complete Study Pack for Engineering Entrances Objective Physics Vol 2>Chapter 8 - Interference and Diffraction of Light>Objective Problems [Level 1]>Q 26

Intensity at centre in Young's double slit experiment is

I_{0}

. If one slit is covered, then intensity at centre will be,

It is found that when waves from two identical coherent sources superpose at a certain point, the resultant intensity is equal to the intensity of one wave only. This means that the phase difference between the two waves at that point is,

Important Questions on Interference and Diffraction of Light

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