Question # 1

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

The light energy travels in space as waves was firstly proposed by

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Maxwell

Young

Einsten

Hydrogen

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 centre of Newton's rings will be

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Dark

Bright

Coloured

Not visible

An oil film on water surface shows colour due to.

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Diffraction

Interference

Polarization

Dispersion

According to Hygen's principle, each point on a wave front acts as a source of.

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Secondary wavelet

New wave front

Sound

Primary wavelet

The Bragg's equation is given by

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Which of the following is evidence of wave nature of light

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Interference

Diffraction

Polarization

All of these

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

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

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

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

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

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Wave front

Diffraction

Interference

Polarization

Soap film is sunlight appears coloured due to.

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Dispersion of light

Diffraction of light

Scattering of light

Interference fo light

Light entering rom air glass does not change in its.

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Frequency

Wavelength

Velocity

Direction

The property of bending of light around obstacles is

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Interference

Diffraction

Polarization

Superposition

Which one of the following can not be polarized.

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Ultra violet rays

Radio waves

T.V. Waves

Sound waves

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Physics Fsc Part 1 Chapter 9 Online Test MCQs With Answers

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