Question # 1

Sodium chloride in a flame gives

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Green light

White light

Red light

Yellow light

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

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

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Hemoglobin

Stars

Galaxies

Stones

Light waves emitted from a source spread in

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Specific direction

All direction

Upward direction

None of these

Light entering rom air glass does not change in its.

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Frequency

Wavelength

Velocity

Direction

Newton's rings are formed due to phenomenon of.

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Interference

Dispersion

Diffraction

Polarization

Angle between ray of light and wave front is

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0 ^o

60 ^o

90 ^o

120 ^o

If 'N' is number of lines rule don the grating having length 'L' then grating element 'd' is given by.

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N/L

2N/L

L/N

N/2L

The blue colour of sky is due to

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diffraction

Reflection

Polarization

Scattering

The fringe spacing increases if we use.

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Yellow light

Green lgiht

Blue light

Red light

Dark fringes are also called as

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Minima

Maxima

Wave front

Ray of light

Soap film is sunlight appears coloured due to.

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Dispersion of light

Diffraction of light

Scattering of light

Interference fo light

Huygen's proposed, light energy travels in space from source in

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1578

1678

1778

1868

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

Young in 1801 performed experiment for the first time about

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Interference

Diffraction

Polarization

Particle nature of light

Interplaner distance can be determined by

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Newton's rings

Bragg's law

Diffraction pattern

Interferometer

Which one of the following can not be polarized.

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Ultra violet rays

Radio waves

T.V. Waves

Sound waves

The property of bending of light around obstacles is

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Interference

Diffraction

Polarization

Superposition

The centre of Newton's fringe is dark due to.

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Destructive interference

Diffraction

Constructive interference

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

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Physics Fsc Part 1 Chapter 9 Online Test MCQs With Answers

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