Question # 1

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

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 locus of all pint in the same wave of vibration is called.

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Wave front

Diffraction

Interference

Polarization

Standard metal according to Michelson's interferometer is equivalent to

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1553163.5 wave meter

3 x 108meter

15503000 meter

None of these

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

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Maxwell

Young

Einsten

Hydrogen

Oil film floating on water exhibits colours due to

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Interference

Diffraction

Polarization

All of these

Which one of the following can not be polarized.

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Ultra violet rays

Radio waves

T.V. Waves

Sound waves

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

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

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Refraction

Reflection

Diffraction

Polarization

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

Fringe spacing is inversely proportional to.

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Wave length

Slit separation

Distance between the slit and screen

Frequency of light

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

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Refraction

Polarization

Interference

Diffraction

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

Sodium chloride in a flame gives

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Green light

White light

Red light

Yellow light

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