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Test: Wave Optics - 1 - CUET Humanities MCQ


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Test: Wave Optics - 1 for CUET Humanities 2024 is part of Agriculture Practice Tests: CUET Preparation preparation. The Test: Wave Optics - 1 questions and answers have been prepared according to the CUET Humanities exam syllabus.The Test: Wave Optics - 1 MCQs are made for CUET Humanities 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Wave Optics - 1 below.
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Test: Wave Optics - 1 - Question 1

The fact that light can be polarised establishes that light

Detailed Solution for Test: Wave Optics - 1 - Question 1

Light is a transverse wave. All electromagnetic waves, including light, are transverse waves because they vibrates energy in a direction perpendicular to the direction in which the wave is travelling.

Test: Wave Optics - 1 - Question 2

Yellow light is used in a single slit diffraction experiment with slit width 0.6 mm. If yellow light is replaced by X-rays, then the pattern will reveal

Detailed Solution for Test: Wave Optics - 1 - Question 2

To see the diffraction pattern, wavelength of radiation must be of the order of the dimensions of the slit. But here slit width 0.6 mm is very much large in comparison to wavelength of X-ray (λ = 1Å or 10-7 mm). Therefore no diffraction pattern is observed.

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Test: Wave Optics - 1 - Question 3

A single slit of width 'd' is illuminated by a violet light of wavelength 400 nm, and the width of the diffraction pattern is measured as 'y'. When half of the slit width is covered and illuminated by yellow light of wavelength 600 nm, the width of the diffraction pattern is

Detailed Solution for Test: Wave Optics - 1 - Question 3

In simple slit diffraction experiment, width of central maxima y = 2λD/d
∴ 

= 1/3
y2 = 3y

Test: Wave Optics - 1 - Question 4

In Young's double slit experiment with wavelength λ1, 7th maximum is found at distance d1 and with wavelength λ2, it is found at distance d2. Then, d1/d2 is equal to

Detailed Solution for Test: Wave Optics - 1 - Question 4

For nth bright fringe, we have  = nλ or d = 
When, d = d1λ = λ1
Here, xn = x(Since  and 2 are the wavelengths at d1 and d2 for the 7th maximum.) Or d1 =  ….(1)
Also, d2 =  ….(2)
  = 

Test: Wave Optics - 1 - Question 5

Light of wavelength 600 nm illuminates a diffraction grating. The second-order maximum is at an angle of 39.5°. How many lines per millimetre does this grating have?
(sin 39.5° = 0.636)

Detailed Solution for Test: Wave Optics - 1 - Question 5

For nth order diffraction,




Number of lines per m = 1/d = 530000
Number of lines per mm = 530

Test: Wave Optics - 1 - Question 6

Two waves of light are given by equations y1 = 6 cos t and y2 = 10 sin(t + ). The ratio of intensities at maxima and minima formed by superposition of these two waves is

Detailed Solution for Test: Wave Optics - 1 - Question 6

I1/I= (10 + 6)2/(10 - 6)2 = 16/1 = 16 : 1

Test: Wave Optics - 1 - Question 7

In Young's experiment, when sodium light of wavelength 5893Å is used, then 62 fringes are seen in the field of view. If violet light of wavelength 4358Å is used, then the number of fringes that will be seen in the field of view will be

Detailed Solution for Test: Wave Optics - 1 - Question 7

Given,  = 5893 , n1 = 62,  = 4358 
As field of view in case of both the wavelengths is same, hence

as 
or n2 = n
= 62 × (5893/4358) = 84

Test: Wave Optics - 1 - Question 8

In Young's double slit experiment, the separation between the slits is halved and the distance between the slits and screen is doubled. Then, fringe-width will

Detailed Solution for Test: Wave Optics - 1 - Question 8

Fringe width, 
If D is doubled and d is halved, fringe width will become 4 times.

Test: Wave Optics - 1 - Question 9

Two coherent light beams of intensities I and 4I are superimposed. The maximum and minimum possible intensities in the resulting beam are respectively

Detailed Solution for Test: Wave Optics - 1 - Question 9

 = 1/4

 = 

Test: Wave Optics - 1 - Question 10

In Young's experiment, 70 fringes are observed in a field of vision if yellow light (λ = 5800Å)  is used. How many fringes would be observed in the same field of vision if violet light (λ = 4358Å) is used?

Detailed Solution for Test: Wave Optics - 1 - Question 10

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