Question # 1

The loudness of a sound deepness on its

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Wavelength

Frequency

Wave amplitude

Regularity

operation of a LASER depends upon

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Spontaneous emission of radiation

The existence emission of radiation

The existence of atoms in normal state

The existence of atoms in metastable state

For polarization , the direction of oscillation has to be perpendicular to the direction of travel sound waves are longitudinal waves so they cannot be.

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Reflected

Deflected

Diffracted

polarized

When transvers wave travelling in a less dense medium is reflected at an interface will a more dense medium.

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A trough becomes a crest

There is no phase shift

There is phase shift of 360 ^o

A crest remains a crest

Which of the following refers to the distance from crest to crest of a wave.

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Frequency

Wavelength

Amplitude

Period

The phase velocity is the velocity of a point that moves with a wave at constant phase it is also called.

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Phase speed

Wave speed

Wave velocity

All of these

A monochromatic light beam when passed through a prism is.

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Diffracted

Devlated

Polarized

Dispersed

A water wave is an example of

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Electromagnetic wave

Longitudinal wave

Transverse wave

Reverberation

A sonometer or audiometer is a device based on the principle of.

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Resonance

Beats

Overtones

Harmonics

When temperature increases, frequency of an organ pipe

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Decreases

Increases

Remain the same

Become zero

If the period of a wave motion is 2 s and the wave speed is 4 cm s-1 then its frequency is

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1/8 C s-1

1/2 C s-1

2 C s-1

8 C s-1

A stretched wire with clamped ends has a fundamental frequency of 1,000 Hz. What will be the new fundamental frequency if tension in the wire is increased by 2%

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980 Hz

1,000 Hz

1,010 Hz

1,020 Hz

If a wave vibrate 10 times in 1 s with a speed of 10 m s-1 the correct wavelength of the wave is.

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1 m

10 m

20 m

100 m

If a wave vibrates 10 times in one second with a speed of 10 m s-1 the wavelength will be.

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1 m

10 m

20 m

100 m

A water wave is an example of.

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Transverse wave

Longitudinal wave

Hair wave

Shock wave

If Young's experiment is performed in water. which of the following change will occur.

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Fringe width will increases

Fringe width will decreases

Fringe width will remain unchanged

No fringe will be seen

Newton's rings are experimentally derived from the phenomenon of.

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Polarization of light

Resolution of light

Interference of light

Diffraction of light

Which is the best sound source to produce a pure note.

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Tuning fork

Flute

Drum

Harmonium

Intensity of the dark bands in interference pattern becomes zero when two waves.

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Of light are monochromatic

Are of the same frequency

Are of the same amplitude

Travel in opposite direction

Fringe spacing in double slit experiment can be increased by decreasing.

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Wavelength of light

Width of slits

Slite separation

Distance between the slits and screen

Which form of electromagnetic radiation is used in RADAR.

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Long wavelength ultraviolet waves

short wavelength microwaves

short wavelength infrared wave

Long wavelength radiowaves

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