Question # 1

Which one of the following can not be polarized.

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Ultra violet rays

Radio waves

T.V. Waves

Sound waves

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

Light entering rom air glass does not change in its.

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Frequency

Wavelength

Velocity

Direction

The distinguish between transverse and longitudinal wave_______ is used.

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Refraction

Interference

Diffraction

polarization

Bright fringes are also called as

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Minima

Maxima

Wave front

Ray of light

Michelson's interferometer can be used ot find the

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Velocity of light

Wavelength of light

Velocity of sound

Wavelength of sound

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

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

Dark fringes are also called as

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Minima

Maxima

Wave front

Ray of light

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

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Decreases

Remain same

Increases

Becomes zero

The blue colour of sky is due to

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diffraction

Reflection

Polarization

Scattering

Fringe spacing is inversely proportional to.

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Wave length

Slit separation

Distance between the slit and screen

Frequency of light

If 'N' is number of lines rule don the grating having length 'L' then grating element 'd' is given by.

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N/L

2N/L

L/N

N/2L

The distance between two consecutive wave front is equal to

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One wave length

Two wave length

Half wave length

Three wave length

Newton's rings are formed due to phenomenon of.

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Interference

Dispersion

Diffraction

Polarization

The Bragg's equation is given by

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Sound waves can not be

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Reflected

Refracted

Polarized

Diffracted

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