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Physics English Medium Fsc Part 1 Chapter 9 Online MCQs Test MCQs With Answers
Question # 1
Oil film floating on water exhibits colours due to
Choose an answer
Interference
Diffraction
Polarization
All of these
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Question # 2
Which is nooptically active
Choose an answer
Sugar
Tartaric acid
Water
Sodium chloride
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Question # 3
A typical diffraction grating has certain number of lines per centimeter whose range is.
Choose an answer
40 to 50
400 to 5000
400 to 500
4000 to 5000
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Question # 4
The process of confining the beam of light to vibrate in one plane is called.
Choose an answer
Interference
Diffraction
Polarization
Total internal refraction
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Question # 5
The fringe spacing increases if we use.
Choose an answer
Yellow light
Green lgiht
Blue light
Red light
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Question # 6
A ray of light shows the direction of propagation of light It is line which is.
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Normal to the wave front
Parallax to the wave front
Opposite to the wave front
Equal to the wave front
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Question # 7
According to Huygen's principle the points on primary wave front can be considered as
Choose an answer
Secondary wavelets
Ray of light
Source of light
None of these
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Question # 8
In red light is used as compare to blue light then fringe spacing.
Choose an answer
Decreases
Remain same
Increases
Becomes zero
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Question # 9
A ray of light is a line
Choose an answer
Parallel to wave front
Normal to wave front
Anti-parallel to wave
Any one of these
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Question # 10
Intensity of light depend on
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Wave length
Amplitude
Velocity
Frequency
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Question # 11
Light waves emitted from a source spread in
Choose an answer
Specific direction
All direction
Upward direction
None of these
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Question # 12
In blue light is used as compare to red light then fringe spacing.
Choose an answer
Increase
Decreases
Remain same
Becomes zero
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Question # 13
The phenomenon of polarization of light reveals that sun light is
Choose an answer
Longitudinal waves
Transverse wave
Electromagnetic waves
Monochromatic wave
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Question # 14
Bending of light around the edges of an obstacle is called.
Choose an answer
Refraction
Polarization
Interference
Diffraction
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Question # 15
Soap film is sunlight appears coloured due to.
Choose an answer
Dispersion of light
Diffraction of light
Scattering of light
Interference fo light
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