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Physics Class 11 - Chapter 9
Physical OpticsTest - 4
1.
In double slit experiment if one of the two slits is covered then?
a) No diffraction fringes are observed
b) No fringes are observed
c) No interference fringes are observed
d) Interference pattern not disturbed
2.
In monochromatic red light, a blue book will probably appear to be?
a) Black
b) Black and white
c) Green
d) White
3.
Which experiment shows that wavelength of light is smaller than that of sound?
a) Diffraction
b) Interference
c) Polarization
d) Reflection
4.
Diffraction fringes are?
a) Equally spaced
b) Distance between them increased
c) They are adjacent with no space between them
d) Distance between them decreased
5.
A diffraction grating has 500 lines per mm. its slit spacing will be?
a) 2x10
-3
mm
b) 5x10
-3
mm
c) 500mm
d) 2x10
-5
mm
6.
Light on passing through a Polaroid is?
a) Circular polarized
b) lane polarized
c) Spherical polarized
d) Un-polarized
7.
Which one the following can not be polarized?
a) Sound waves
b) X-rays
c) Radio waves
d) Ultrasonic waves
8.
In a plane polarized light?
a) Vibration in all direction
b) Vibration is in the perpendicular direction in which wave propagates
c) Vibration in two direction
d) No vibration takes place
9.
Definition of material in term of wavelength of red cadmium light is given by?
a) Galileo
b) Michelson
c) Einstein
d) Newton
10.
In the shadow of ball the central portion appears bright that is due to?
a) Reflection
b) Diffraction
c) Interference
d) Polarization
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