Question # 1

Which of the following is evidence of wave nature of light

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Interference

Diffraction

Polarization

All of these

According to Hygen's principle, each point on a wave front acts as a source of.

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Secondary wavelet

New wave front

Sound

Primary wavelet

A ray of light is a line

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Parallel to wave front

Normal to wave front

Anti-parallel to wave

Any one of these

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

The fringe spacing in a double slit experiment can be increased by decreasing.

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Wavelength of light

Width of slits

Slit separation

Distance between the slits and the screen

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

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Decreases

Remain same

Increases

Becomes zero

Bright fringes are also called as

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Minima

Maxima

Wave front

Ray of light

Oil film floating on water exhibits colours due to

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Interference

Diffraction

Polarization

All of these

the locus of all pint in the same wave of vibration is called.

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Wave front

Diffraction

Interference

Polarization

The centre of Newton's fringe is dark due to.

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Destructive interference

Diffraction

Constructive interference

Polarization

Huygen's proposed, light energy travels in space from source in

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1578

1678

1778

1868

The distance between two consecutive wave front is equal to

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One wave length

Two wave length

Half wave length

Three wave length

When newton ring are seen through the transmitted light, then central spot is.

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Dark

Blue

Bright

Red

Angle between ray of light and wave front is

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0 ^o

60 ^o

90 ^o

120 ^o

Sodium chloride in a flame gives

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Green light

White light

Red light

Yellow light

The distinguish between transverse and longitudinal wave_______ is used.

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Refraction

Interference

Diffraction

polarization

In case of point source the shape of wave front is

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Circular

Spherical

Elliptical

Square

In case of point source the shape of wave front is.

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Plane

spherical

Circular

Eliptical

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11th Class Part 1 Physics Chapter 9 Test Online MCQs With Answers

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