Question # 1

A bat while flying determines the location and nature of object in his way by sending.

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Infrasonic waves

Ultrasonic waves

Supersonic waves

Ultraviolet waves

When sound waves enter a different medium the quantity that remains unchanged a.

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Wavelength

Speed

frequency

Intensity

The sweetness or harshness of a sound depends upon its

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Wavelength

Frequency

Amplitude

Regularity

On reflection of light from a source there occurs a change in

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Wavelength

Velocity

Period

Frequency

The wavelength of Pascha series lies is the

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Visible region

Ultraviolet region

Infrared region

Invisible region

The locus of all points in a medium having the same phase of vibration is called.

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Creast

trough

Wavelength

Wave front

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

The variation in the speed of sound with temperature is greater in.

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Gases

Metals

Liquids

Insulators

Sound of frequencies lower than 20 Hz are called.

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Supersonics

Infra sonics

Ultrasonic

Audible sound waves

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

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Resonance

Beats

Overtones

Harmonics

When wind blows in the same direction in which the sound travels, the sound velocity

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Decreases

Increases

Remains unchanged

Becomes zero

A thin layer of oil the surface of water looks coloured due to.

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Pillarization of light

Different elements present in the oil

Interference of light

Transmission of light

Which of the following is a transverse wave.

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Sound wave

Shock wave

Hair wave

Radiowave

When a transverse wave is reflected on going from a more dense to a less dense medium.

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There is no phase shift

There is a 180 ^o phase shift

There is a phase shift of 360 ^o

A crest is transformed to a trough

A sheet of transparent material with fine equality spaced lines ruled parallel on its surface is called.

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Interferometer

Grating element

ruler

Patch

Two sources of sound are said to be in resonance when.

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They look like similar

They produce sound of same frequency

They are enacted by the same agent

They differ from each other

Plane polarized light can be produce dby

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Simple reflection

Double refrraction

Scattering of light

All of these

On average there is no energy transfer in.

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Sound waves

Water waves

Standing waves

Mechanical waves

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

Which of the following is nearly monochromatic

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Light from sodium lamp

Light from candle

Light from gas lamp

Light from sun

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

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

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