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 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

Intensity of light depend on

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Wave length

Amplitude

Velocity

Frequency

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

An oil film on water surface shows colour due to.

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Diffraction

Interference

Polarization

Dispersion

Which is nooptically active

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Sugar

Tartaric acid

Water

Sodium chloride

A typical diffraction grating has certain number of lines per centimeter whose range is.

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40 to 50

400 to 5000

400 to 500

4000 to 5000

The blue colour of sky is due to

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diffraction

Reflection

Polarization

Scattering

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

Example of thin film is.

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Soap burble

convex lens

Concave lens

Glass plate

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

Sound waves can not be

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Reflected

Refracted

Polarized

Diffracted

Interplaner distance can be determined by

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Newton's rings

Bragg's law

Diffraction pattern

Interferometer

Light waves emitted from a source spread in

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Specific direction

All direction

Upward direction

None of these

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

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

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Decreases

Remain same

Increases

Becomes zero

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