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Physics Class 11 - Chapter 9
Physical OpticsTest - 3
1.
In Yong’s double slit experiment, if white light is used?
a) Alternate dark and bright fringes will be formed
b) No interference fringes will be formed
c) Impossible to predict
d) Coloured fringes will be formed
2.
When crust of one wave falls on the trough of the other wave, this is called?
a) Diffraction
b) Constructive interference
c) Polarization
d) Destructive interference
3.
Longitudinal waves does not show?
a) Polarization
b) Diffraction
c) Reflection
d) Refraction
4.
The velocity of light was accurately measured by?
a) Young
b) Huygens
c) Newton
d) Michelson
5.
Which one is nearly monochromatic light?
a) Light from neon lamp
b) Light from sodium lamp
c) Light from simple lamp
d) Light from fluorescent bulb
6.
Two source of light are coherent if they emit rays of?
a) Same amplitude and wavelength
b) Same wavelength with constant phase difference
c) Same wave front
d) Same wavelength
7.
A point source of light placed in a homogeneous medium gives rise to?
a) A plane wave front
b) An elliptical wave front
c) A cylindrical wave front
d) A spherical wave front
8.
The locus of all points in a medium having the same phase of vibration is called?
a) Wave front
b) Trough
c) Wavelength
d) Crust
9.
Crystal of a material can be behave as?
a) Interferometer
b) Concave
c) Diffraction grating
d) Convex lens
10.
Central spot of Newton’s ring is?
a) Dark
b) Bright for large wavelength
c) Bright
d) Dark for large wavelength
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