Question # 1

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

Dark fringes are also called as

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Minima

Maxima

Wave front

Ray of light

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

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

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 fringe spacing increases if we use.

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Yellow light

Green lgiht

Blue light

Red light

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

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10^-8 m

10^-10m

10^-5m

10^-4m

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

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Refraction

Reflection

Diffraction

Polarization

Which is nooptically active

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Sugar

Tartaric acid

Water

Sodium chloride

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

The blue colour of sky is due to

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diffraction

Reflection

Polarization

Scattering

The phenomenon of polarization of light reveals that sun light is

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Longitudinal waves

Transverse wave

Electromagnetic waves

Monochromatic wave

Soap film is sunlight appears coloured due to.

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Dispersion of light

Diffraction of light

Scattering of light

Interference fo light

In case of point source the shape of wave front is

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Circular

Spherical

Elliptical

Square

Light waves emitted from a source spread in

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Specific direction

All direction

Upward direction

None of these

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

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Maxwell

Young

Einsten

Hydrogen

Angle between ray of light and wave front is

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0 ^o

60 ^o

90 ^o

120 ^o

The Bragg's equation is given by

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