Question # 1

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

Intensity of light depend on

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Wave length

Amplitude

Velocity

Frequency

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

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Destructive interference

Diffraction

Constructive interference

Polarization

Sound waves can not be

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Reflected

Refracted

Polarized

Diffracted

The centre of Newton's rings will be

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Dark

Bright

Coloured

Not visible

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

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Decreases

Remain same

Increases

Becomes zero

An oil film on water surface shows colour due to.

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Diffraction

Interference

Polarization

Dispersion

Which of the following is evidence of wave nature of light

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Interference

Diffraction

Polarization

All of these

Which is nooptically active

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Sugar

Tartaric acid

Water

Sodium chloride

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

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

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Plane

spherical

Circular

Eliptical

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

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

Angle between ray of light and wave front is

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0 ^o

60 ^o

90 ^o

120 ^o

The process of confining the beam of light to vibrate in one plane is called.

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Interference

Diffraction

Polarization

Total internal refraction

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

Soap film is sunlight appears coloured due to.

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Dispersion of light

Diffraction of light

Scattering of light

Interference fo light

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

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Refraction

Reflection

Diffraction

Polarization

The property of bending of light around obstacles is

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Interference

Diffraction

Polarization

Superposition

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

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1578

1678

1778

1868

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