Question # 1

A Spectrum of radiation in which the quantity being studied, such as frequency or energy takes on discrete values is called.

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Continuous spectra

Band spectra

Discrete spectra

Normal spectrum

Ultra sonics are the

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Frequencies in the audible range

Frequencies greater than 20 Hz

Frequencies greater than 20 KHz

Frequency lower than 20 KHz

X-rays travels ins straight line with velocity

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Less than light

Greater than light

Equal to light

Equal to sound

A cork moes at 5 m s-1 on the crest of a wave The distance between the crests is 10 m. The frequency of the wave motion is.

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0.5 Hz

1.0 Hz

2.0 Hz

5.0 Hz

Blue colour of sky is due to.

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Diffraction

Reflection

Polarization

Scattering

The amplitude of sound wave determines its

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Pitch

Loudness

Reverberation

Interference

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

On which parameter the path difference between two interfering waves depends upon.

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Amplitude

Pitch

Intensity

Phase angle

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 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

In order to har an echo what is the minimum distance between the sound and reflecting surface.

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0.65 m

16.5 m

1.65 m

165 m

The distance between any two consecutive bright or dark fringes is called.

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Wavelength

Amplitude

Fringe spacing

Wavelet

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

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Resonance

Beats

Overtones

Harmonics

Which of the following gives discrete emission spectrum.

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Sun

Candle

Incandescent filament

Mercury vapour lamp

When two identical travelling waves are superposed, velocity of the resultant wave

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Remains unchanged

Decreases

Increases

Become zero

Michelson's interferometer can b e sued to find

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Velocity of light

Velocity of sound

Wavelength of light

Wavelength of sound

the amplitude of a wave indicates

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Wavelength

Frequency

Intensity of wave

Nature of wave

It is possible is distinguish between transvers and longitudinal waves from the property of.

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Refraction

Interference

Diffraction

Polarization

In solid and liquids the variation of the speed of sound with temperature is.

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Much greater than in air

Slightly les than in air

The same as in air

Smell and usually negligible

A body travels with a speed greater than the speed of sound What would be the wave front shape.

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Ellipitical

Spherical

Conical

Parabolical

Bracket and plunk series of spectral lines lye in the

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Visible region

Ultraviolet region

Far infrared region

Infrared region

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PPSC Physics Chapter 5 Waves and Wave Properties of Light MCQs With Answers

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