Question # 1

The blue colour of sky is due to

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diffraction

Reflection

Polarization

Scattering

The process of confining the beam of light to vibrate in one plane is called.

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Interference

Diffraction

Polarization

Total internal refraction

X-ray diffraction has been very useful in determining the structure of

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Hemoglobin

Stars

Galaxies

Stones

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

Soap film is sunlight appears coloured due to.

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Dispersion of light

Diffraction of light

Scattering of light

Interference fo light

The Bragg's equation is given by

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When newton ring are seen through the transmitted light, then central spot is.

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Dark

Blue

Bright

Red

Fringe spacing is inversely proportional to.

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Wave length

Slit separation

Distance between the slit and screen

Frequency of light

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

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Wave front

Diffraction

Interference

Polarization

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

The property of bending of light around obstacles is

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Interference

Diffraction

Polarization

Superposition

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

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

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

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Refraction

Reflection

Diffraction

Polarization

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

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Decreases

Remain same

Increases

Becomes zero

Young in 1801 performed experiment for the first time about

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Interference

Diffraction

Polarization

Particle nature of light

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