Question # 1

Example of thin film is.

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Soap burble

convex lens

Concave lens

Glass plate

The centre of Newton's rings will be

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Dark

Bright

Coloured

Not visible

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

Angle between ray of light and wave front is

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0 ^o

60 ^o

90 ^o

120 ^o

The fringe spacing increases if we use.

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Yellow light

Green lgiht

Blue light

Red light

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

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10^-8 m

10^-10m

10^-5m

10^-4m

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

Hygen's principle is used for.

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Explain polarization

Locate the wave front

Find the speed of light

Find the index of refraction

Newton's rings are formed due to phenomenon of.

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Interference

Dispersion

Diffraction

Polarization

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

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