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Chapter 9 - Physical Optics - 5
1.
Waves coming out from a source of light will propagate inwards in all directions.
a) True
b) False
2.
A small portion on a wave front is called a plane wave-front.
a) False
b) True
3.
Two non coherent beams of light will give interference pattern.
a) False
b) True
4.
In interference by thin films, the path difference does not depend upon thickness and nature of the film.
a) True
b) False
5.
In forming the Newton's rings, a plano-convex lens of long focal length is placed in contact on a plane glass plate.
a) True
b) False
6.
A diffraction grating is a glass plate having a large number of equidistant slits.
a) False
b) True
7.
If θ is zero in equation d sinθ = mλ. The path difference between two rays will be zero.
a) True
b) False
8.
For the dark fringe, d sinθ = 2λ.
a) True
b) False
9.
According to Huygen's, light consist of photons.
a) True
b) False
10.
X-Rays are a type of electromagnetic radiations of much shorter wavelengths.
a) False
b) True
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