61.
The angle of incidence for a wave
A
can be measured between the incident ray and the normal
B
can be measured between the incident wave front and the boundary
C
is equal to the angle of reflection
D
all of the above
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The angle of incidence for a wave
can be measured between the incident ray and the normal
can be measured between the incident wave front and the boundary
is equal to the angle of reflection
all of the above
significant diffraction of X ray can be obtained
By a single slit
By a double slit
By diffraction
By Atomic crystal
Second glass plate in Michelson s Interferometer is known as
Extra glass plate
Compensating glass plate
Simple Glass Plate
None of these
Rainbow is due to
absorption of sunlight in minute water droplets
diffusion of sunlight through water droplets
ionization of water deposits
refraction and reflection of sunlight by water droplets
Radio telescopes are better than optical telescopes because
they can detect faint galaxies which no optical telescope can
they can work even in cloudy conditions
they can work during the day and night
All of the above
Optical fiber works on the
principle of refraction
total internal reflection
scattering
interference
On a rainy day, small oil films on water show brilliant colors. This is due to
dispersion
interference
diffraction
Polarization
Newtons rings experiment is performed with air gap between lens and plate. Now that gap is filled with water. What will be effect on radius (or diameter)?
Radius (or diameter) will remain constant but there will be more brightness
Radius (or diameter) will increase
Radius (or diameter) will decrease
There will be no effect
Newtons rings experiment is performed and radius (or diameter) is calculated. Now Plano-convex lens is replaced with another Plano-convex lens of greater Radius of curvature. What will be effect on radius (or diameter)?
Radius (or diameter) will remain constant but there will be more brightness
Radius (or diameter) will increase
Radius (or diameter) will decrease
There will be no effect
Newtons rings are formed because of interference between the light Reflected from
Upper surface of Plano-convex lens and lower surface of plane glass plate
Lower surface of Plano-convex lens and upper surface of plane glass plate
Lower and upper surface of Plano-convex
Lower and upper surfaces of plane glass plate
Newtons light illustrate the phenomenon of
Interference
Diffraction
Dispersion
Polarisation
Newtons light illustrate the phenomenon of
Interference
Diffraction
Dispersion
Polarization
Light travels fastest
In a vacuum
through water
Through glass
through diamond
Light is
an electromagnetic wave
a form of energy visible to the human eye
the same type of energy as an X ray
all of the above
Light enters air from water. The angle of refraction will be
Greater than the angle of incidence.
Equal to the angle of incidence.
Less than the angle of incidence.
None of these
Interference pattern is observed in wedge-shaped film for monochromatic light. Now monochromatic light is replaced by white light. What will be the effect on interference pattern?
It will turn to dark
It will turn to bright
Bands will disappear
It will be a mixture of all colors
Interference pattern is observed in wedge-shaped film and bandwidth is noted. Now the thin film is replaced by the film of higher refractive index. What will be the effect on bandwidth?
Bandwidth increases
Bandwidth decreases
Bands will merge
There will not any effect
Interference pattern is observed in wedge-shaped film and bandwidth is noted. Now the angle of wedge is reduced. What will be the effect on bandwidth?
Bandwidth increases
Bandwidth decreases
Bands will disappear
There will not any effect
Interference pattern is observed in wedge-shaped film and bandwidth is noted. Now the angle of wedge is reduced to zero. What will be the effect on Bandwidth?
Bandwidth increases
Bandwidth decreases
Bands will disappear
There will not any effect
Interference of light is evidence that
The speed of light is very large
light is a transverse wave
light is electromagnetic in character
Light is a wave phenomenon