Question # 1

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

In case of point source the shape of wave front is.

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Plane

spherical

Circular

Eliptical

Sound waves can not be

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Reflected

Refracted

Polarized

Diffracted

Newton's rings are formed due to phenomenon of.

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Interference

Dispersion

Diffraction

Polarization

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

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Wave front

Diffraction

Interference

Polarization

The centre of Newton's rings will be

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Dark

Bright

Coloured

Not visible

The fringe spacing increases if we use.

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Yellow light

Green lgiht

Blue light

Red light

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

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

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

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

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Decreases

Remain same

Increases

Becomes zero

Sodium chloride in a flame gives

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Green light

White light

Red light

Yellow light

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

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Refraction

Polarization

Interference

Diffraction

The fringe spacing in a double slit experiment can be increased by decreasing.

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Wavelength of light

Width of slits

Slit separation

Distance between the slits and the screen

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Physics English Medium Fsc Part 1 Chapter 9 Online MCQs Test MCQs With Answers

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