BITSAT SERIES

Physics

Wave Interference

8 previous year questions.

Volume: 8 Ques

Yield: Medium

High-Yield Trend

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2020

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2019

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2017

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2016

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2013

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2012

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2010

Chapter Questions
8 MCQs

01

PYQ 2010

medium

physics ID: bitsat-2

A wave y=a(ω t-kx) on a string meets with another wave producing a node at x=0. Then the equation of the unknown wave is

1

y=a(ω t+kx)

2

y=-a(ω t+kx)

3

y=a(ω t-kx)

4

y=-a(ω t-kx)

02

PYQ 2012

medium

physics ID: bitsat-2

A mica slit of thickness t and refractive index is introduced in the ray from the first source . By how much distance of fringes pattern will be displaced?

1

2

3

4

03

PYQ 2013

medium

physics ID: bitsat-2

In Young's double-slit experiment, the 10th-order maximum is obtained at the point of observation in the interference pattern for . If the source is replaced by another one of wavelength 5000 Å, then the order of maximum at the same point will be â

1

12th

2

14th

3

16th

4

18th

04

PYQ 2016

medium

physics ID: bitsat-2

A ray of light of intensity I is incident on a parallel glass slab at point A as shown in the diagram. It undergoes partial reflection and refraction. At each reflection, 25% of incident energy is reflected. The rays AB and A'B' undergo interference. The ratio of Imax and Imin is:

1

2

3

4

8:1

05

PYQ 2016

medium

physics ID: bitsat-2

In Young’s double-slit experiment, the intensity of light at a point on the screen where the path difference is Kλ is K (λ being the wavelength). The intensity at a point where the path difference is λ/4 will be:

1

2

3

4

Zero

06

PYQ 2017

medium

physics ID: bitsat-2

There are two sources kept at distances 2λ. A large screen is perpendicular to the line joining the sources. Number of maxima on the screen in this case is (λ= wavelength of light)

1

1

2

3

3

5

4

7

07

PYQ 2019

medium

physics ID: bitsat-2

Calculate the wavelength of light used in an interference experiment from the following data: Fringe width = 0.03cm. Distance between the slits and eyepiece through which the interference pattern is observed is 1m. Distance between the images of the virtual source when a convex lens of focal length 16cm is used at a distance of 80cm from the eyepiece is 0.8cm.

1

2

3

4

6000AA

08

PYQ 2020

medium

physics ID: bitsat-2

A ray of light of intensity I is incident on a parallel glass slab at point A as shown in diagram. It undergoes partial reflection and refraction. At each reflection, 25% of incident energy is reflected. The rays AB and A'B' undergo interference. The ratio of Imax and Imin is:

1

2

3

4

8:1