Question # 1

Interference fringe spacing depends on

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The wavelength of light used

The distance screen from the coherent sources

Separation between the sources

All of the above

Wave length of a LASER can be sued as a standard of.

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Angle

Time

Length

Temperature

Mostly widely used types of gas LASER are.

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Neon

Argon ion

Helium

All of these

Distance between two consecutive nodes or antinodes is equal to.

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Lamda /4

Lamda

Lamda /2

2 lamda

The wave phenomenon that classifies light as a transverse wave is.

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Polarization

Diffraction

Interference

Refraction

Electromagnetic waves transmit.

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Energy only

Momentum only

Energy and momentum

Light

Plane polarized light can be produce dby

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Simple reflection

Double refrraction

Scattering of light

All of these

Which technique uses underwater sound propagation to detect and locate submerged objects.

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RADAR

LIDAR

SONAR

LASER

The quality of a note

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Decreases with loudness

Varies directly as its pitch

Varies inversely as its pitch

Depends upon the overtones

If the wavelength of a wave is 1 cm and its period is 0.02 s , velocity of the wave will be

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20 cm s-1

50 m s-1

60 cm s-1

100 cm s-1

A sound wave is an example of

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Transverse wave

longitudinal waves

Hair wave

Stationary wave

The loudness of a sound depends on its

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Wavelength

Frequency

Wave amplitude

Regularity

Ultrasonic sound waves

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Can be heard by a normal human ear

Can be heard with the help of hearing apparatus

Can be heard with the help of microphone

cannot be heard

Light product by a single Nicole is

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Unpolarized

Plane polarized

Circulatory polarized

Elliptically polarized

According to Huygen's principle

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Light bends round corners

Light travels in a straight line

All points on primary wave front are considered centre of distances

Light has wave nature

Which of the following represents an elastic wave.

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Light waves

Radiowaves

X-rays

Sound waves

Which effect explain the frequency shift that occurs when there is motion sound a listener or both relative to the medium.

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Early effect

Doppler's effect

Hall effect

Zeeman effect

The polarization of an electromagnetic wave is determined by

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The magnetic field

The electric field

The electric and magnetic fields

The field direction of propagation of electromagnetic waves

The dispersive power of a grating is

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Light used

Separation of lines

Frequency of light used

Independent of wavelength

Hygen's principle states that

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Light travels in straight line

Light travels in electromagetic waves

All points of primary wave front are source of secondary wavelets

Light has dual nature

When mas of a string is increased 4 times its original valve, the velocity of the wave.

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Becomes double

Reduces to one half

Reduces to one fourth

Increases 4 times to its original value

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