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11th Class Part 1 Physics Chapter 9 Test Online MCQs With Answers
Question # 1
Example of thin film is.
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Soap burble
convex lens
Concave lens
Glass plate
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Question # 2
The fringe spacing in a double slit experiment can be increased by decreasing.
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Wavelength of light
Width of slits
Slit separation
Distance between the slits and the screen
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Question # 3
According to Hygen's principle, each point on a wave front acts as a source of.
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Secondary wavelet
New wave front
Sound
Primary wavelet
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Question # 4
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 # 5
The Bragg's equation is given by
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Question # 6
The light energy travels in space as waves was firstly proposed by
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Maxwell
Young
Einsten
Hydrogen
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Question # 7
In case of point source the shape of wave front is
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Circular
Spherical
Elliptical
Square
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Question # 8
Newton's rings are formed due to phenomenon of.
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Interference
Dispersion
Diffraction
Polarization
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Question # 9
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 # 10
The property of bending of light around obstacles is
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Interference
Diffraction
Polarization
Superposition
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Question # 11
The wavelength of X-rays is of the order of.
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10
-8
m
10
-10
m
10
-5
m
10
-4
m
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Question # 12
When one mirror of a Michelson interferometer is moved a distance of 0.5 mm, 2000 fringes and observed, The wavelength of light used is.
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5000 m
50000 A
o
500 cm
2000 A
o
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Question # 13
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 # 14
Bright fringes are also called as
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Minima
Maxima
Wave front
Ray of light
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Question # 15
Sodium chloride in a flame gives
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Green light
White light
Red light
Yellow light
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Question # 16
the locus of all pint in the same wave of vibration is called.
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Wave front
Diffraction
Interference
Polarization
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Question # 17
The centre of Newton's rings will be
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Dark
Bright
Coloured
Not visible
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Question # 18
In case of point source the shape of wave front is.
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Plane
spherical
Circular
Eliptical
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Question # 19
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 # 20
Bending of light around the edges of an obstacle is called.
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Refraction
Polarization
Interference
Diffraction
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Question # 21
Which is nooptically active
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Sugar
Tartaric acid
Water
Sodium chloride
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