Question # 1

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

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Wave front

Diffraction

Interference

Polarization

The Bragg's equation is given by

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Light waves emitted from a source spread in

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Specific direction

All direction

Upward direction

None 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

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

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Refraction

Reflection

Diffraction

Polarization

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

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

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10^-8 m

10^-10m

10^-5m

10^-4m

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

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Refraction

Polarization

Interference

Diffraction

Angle between ray of light and wave front is

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0 ^o

60 ^o

90 ^o

120 ^o

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

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