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Physics Class 11 - Chapter 9
Physical OpticsTest - 5
1.
When one mirror of Michelson interferometer is moved a distance of 0.5mm, we observe 2000 fringes then the wavelength is?
a) 5000m
b) 2000nm
c) 5000nm
d) 5000A
o
2.
The blue of colour in the sky is due to?
a) Scattering
b) Interference
c) Diffraction
d) Reflection
3.
The condition for the constructive interference of two coherent lights is that path difference should be?
a) Integral multiple of lambda
b) Even integral multiple of lambda
c) Odd integral multiple of lambda/2
d) Integral multiple of lambda/2
4.
Diffraction effect is?
a) More for a round edge
b) Less for a sharp edge
c) Less for a round edge
d) More for a sharp edge
5.
A light ray form rare to denser medium suffers a phase angle of?
a) 180
b) 60
c) 45
d) 90
6.
In an interference pattern?
a) Bright fringes are wider than dark one
b) Both are of equal sizes
c) Dark fringes are wider than bright one
7.
Polarization has established that light is?
a) All of these
b) Longitudinal
c) Perpendicular mannered
d) Transverse
8.
Tourmaline crystal is a?
a) Diffractor
b) Polarizer
c) Reflector
d) All of these
9.
Diffraction grating is a piece of glass with?
a) 4000-500 lines per cm
b) 4000-5000 lines per cm
c) 400-5000 lines per cm
d) 400-500 lines per cm
10.
The wavelength of X-rays is of the order?
a) 1000A
o
b) 1A
o
c) 10A
o
d) 100A
o
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