Question # 1

Which of the following is evidence of wave nature of light

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Interference

Diffraction

Polarization

All of these

In case of point source the shape of wave front is

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Circular

Spherical

Elliptical

Square

When one mirror of a Michelson interferometer is moved a distance of 0.5 mm, 2000 fringes and observed, The wavelength of light used is.

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5000 m

50000 A^o

500 cm

2000 A^o

Oil film floating on water exhibits colours due to

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Interference

Diffraction

Polarization

All of these

Bending of light around the edges of an obstacle is called.

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Refraction

Polarization

Interference

Diffraction

The centre of Newton's rings will be

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Dark

Bright

Coloured

Not visible

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

The blue colour of sky is due to

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diffraction

Reflection

Polarization

Scattering

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

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10^-8 m

10^-10m

10^-5m

10^-4m

The fringe spacing increases if we use.

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Yellow light

Green lgiht

Blue light

Red light

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

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Decreases

Remain same

Increases

Becomes zero

Interplaner distance can be determined by

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Newton's rings

Bragg's law

Diffraction pattern

Interferometer

Dark fringes are also called as

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Minima

Maxima

Wave front

Ray of light

Example of thin film is.

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Soap burble

convex lens

Concave lens

Glass plate

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

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

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Maxwell

Young

Einsten

Hydrogen

Soap film is sunlight appears coloured due to.

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Dispersion of light

Diffraction of light

Scattering of light

Interference fo light

Light waves emitted from a source spread in

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Specific direction

All direction

Upward direction

None of these

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