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Chapter 9 - Physical Optics - 4
1.
For the interference of light waves the beams of light must be
a) Monochromatic
b) Monochromatic and coherent
c) coherent
d) Gamma Rays
2.
mλ
a) λ L x d
b) λ L / d
c) λ L + d
d) λ m + d
3.
Path difference for constructive interference in diffraction grating is
a) 1/4mλ
b) 1/2mλ
c) mλ
d) 1/3mλ
4.
Plano convex lens of long focal length is used to form
a) Octet Law
b) Newton's Rings
c) Newton's Laws
d) Ohm's Law
5.
Wave length of x-rays
a) 10
-10
m
b) 10
2
m
c) 10
-2
m
d) 10
10
m
6.
An ordinary incandescent light emits
a) polarized light
b) Un-polarized light
c) Yellow light
d) Blue Light
7.
Optically active crystals can be used to determine their
a) Concentration of the solutions
b) Electric field vector
c) Magnetic field vector
d) Static Electric Field
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