Question # 1

In young's double slit experiment for the interference the central region will be

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Dark

Bright

Coloured

None of these

Light waves emitted from a source spread in

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Specific direction

All direction

Upward direction

None of these

In case of point source the shape of wave front is

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Circular

Spherical

Elliptical

Square

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

Angle between ray of light and wave front is

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0 ^o

60 ^o

90 ^o

120 ^o

Fringe spacing is inversely proportional to.

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Wave length

Slit separation

Distance between the slit and screen

Frequency of light

The light energy travels in space as waves was firstly proposed by

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Maxwell

Young

Einsten

Hydrogen

Fringe spacing in Young's double slit experiment increases due to increase in.

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Slit separation

Wave length

Order of Fringe

Frequency of source

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

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Dark

Blue

Bright

Red

The wavelength of X-rays is of the order of.

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10^-8 m

10^-10m

10^-5m

10^-4m

The Bragg's equation is given by

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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

Bright fringes are also called as

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Minima

Maxima

Wave front

Ray of 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

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

The phenomenon of polarization of light reveals that sun light is

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Longitudinal waves

Transverse wave

Electromagnetic waves

Monochromatic wave

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

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