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Online Tests
Physics English Medium Fsc Part 1 Chapter 9 Online MCQs Test MCQs With Answers
Question # 1
Angle between ray of light and wave front is
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0
o
60
o
90
o
120
o
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Question # 2
Dark fringes are also called as
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Minima
Maxima
Wave front
Ray of light
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Question # 3
A typical diffraction grating has certain number of lines per centimeter whose range is.
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40 to 50
400 to 5000
400 to 500
4000 to 5000
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Question # 4
Light waves emitted from a source spread in
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Specific direction
All direction
Upward direction
None of these
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Question # 5
In blue light is used as compare to red light then fringe spacing.
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Increase
Decreases
Remain same
Becomes zero
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Question # 6
The phenomenon of polarization of light reveals that sun light is
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Longitudinal waves
Transverse wave
Electromagnetic waves
Monochromatic wave
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Question # 7
Sound waves can not be
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Reflected
Refracted
Polarized
Diffracted
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Question # 8
In red light is used as compare to blue light then fringe spacing.
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Decreases
Remain same
Increases
Becomes zero
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Question # 9
The Bragg's equation is given by
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Question # 10
Fringe spacing is inversely proportional to.
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Wave length
Slit separation
Distance between the slit and screen
Frequency of light
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Question # 11
Young in 1801 performed experiment for the first time about
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Interference
Diffraction
Polarization
Particle nature of light
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Question # 12
The distance between two consecutive wave front is equal to
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One wave length
Two wave length
Half wave length
Three wave length
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Question # 13
According to Huygen's principle the points on primary wave front can be considered as
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Secondary wavelets
Ray of light
Source of light
None of these
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Question # 14
Soap film is sunlight appears coloured due to.
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Dispersion of light
Diffraction of light
Scattering of light
Interference fo light
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Question # 15
Example of thin film is.
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Soap burble
convex lens
Concave lens
Glass plate
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