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Physics Class 11 - Chapter 9
Physical OpticsTest - 1
1.
Sensation of vision is produced by?
a) Energy
b) Light
c) None of these
d) Both of these
2.
Condition for interference of light is?
a) Monochromatic
b) Same direction
c) All of these
d) Same medium
3.
Position of new wave front of all secondary wavelets is for others is?
a) Parallel
b) Tangent
c) Any of these
d) Normal
4.
Locus of point which all have same phase of vibrations is called?
a) Wave front
b) Wave form
c) Wave rotation
d) Wave motion
5.
The thinner part of wedge film is always?
a) Variable
b) Bright
c) Dark
d) Always black
6.
The numbers of wave front possible is?
a) 10
b) 5
c) 100
d) Infinite
7.
The distance between consecutive wave front is?
a) One wave length
b) Three wave length
c) Two wave length
d) Four wave length
8.
A point source placed at principle focus of convex lens will produced?
a) Circular wave front
b) Spherical wave front
c) Plane wave front
d) Linear wave front
9.
Point light source produces?
a) Circular wave front
b) Linear wave front
c) None of these
d) Spherical wave front
10.
Every point on wave front is a source of?
a) Secondary wavelets
b) All of these
c) Secondary wave form
d) Secondary wave front
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