Question # 1

The property of bending of light around obstacles is

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Interference

Diffraction

Polarization

Superposition

Angle between ray of light and wave front is

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0 ^o

60 ^o

90 ^o

120 ^o

Example of thin film is.

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Soap burble

convex lens

Concave lens

Glass plate

Sodium chloride in a flame gives

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Green light

White light

Red light

Yellow light

According to Huygen's principle the points on primary wave front can be considered as

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Secondary wavelets

Ray of light

Source of light

None of these

Light waves emitted from a source spread in

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Specific direction

All direction

Upward direction

None of these

Hygen's principle is used for.

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Explain polarization

Locate the wave front

Find the speed of light

Find the index of refraction

Bright fringes are also called as

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Minima

Maxima

Wave front

Ray of light

The Bragg's equation is given by

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In case of point source the shape of wave front is

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Circular

Spherical

Elliptical

Square

In blue light is used as compare to red light then fringe spacing.

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Increase

Decreases

Remain same

Becomes zero

Which phenomenon of light proves that light waves are transverse in nature.

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Refraction

Reflection

Diffraction

Polarization

If 'N' is number of lines rule don the grating having length 'L' then grating element 'd' is given by.

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N/L

2N/L

L/N

N/2L

A ray of light shows the direction of propagation of light It is line which is.

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Normal to the wave front

Parallax to the wave front

Opposite to the wave front

Equal to the wave front

Which one of the following can not be polarized.

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Ultra violet rays

Radio waves

T.V. Waves

Sound waves

Sound waves can not be

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Reflected

Refracted

Polarized

Diffracted

Interplaner distance can be determined by

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Newton's rings

Bragg's law

Diffraction pattern

Interferometer

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