Question # 1

Maximum number of orders available with a grating is.

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Independent of grating element

Directly proportional to grating element

Inversely proportional to grating element

Directly proportional to wavelength

The phenomenon of polarization is done by

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Selective absorption

Scattering of light

Refraction of light

Dispersion of light

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

A disturbance that travels through space and time usually accompanied by energy transfer is called.

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sound

Wave

Echo

Frequency

In a stationary wave the particle velocity at the node is

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Zero

Constant

Minimum

Maximum

Monochromatic ight is of single.

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Frequency

Wave length

Amplitude

Pitch

A wave reflected from the boundary of a rarer medium will have phase change

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0 ^o

60 ^o

90 ^o

180 ^o

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

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Refraction

Interference

Diffraction

Polarization

A water wave is an example of.

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Transverse wave

Longitudinal wave

Hair wave

Shock wave

The quality of sound

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Decreases with pitch

Varies directly as its pitch

Varies inversely as its pitch

Depends upon the overtones present there

Which analysis is employed to convert a complex sound into notes.

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Fourier theorem

Milleman theorem

Lissajoes theorem

Demorgan's law

Velocity of sound in air at a given temperature

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Increases with increase in pressure

Is independent of the pressure

Decreases with increases in density

Increases with increase in density

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

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

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Angle

Time

Length

Temperature

The length of piano wire is 1 m and mass is 20 g and it is stretched by a fore of 200 N the fundamental frequency of sound waves produced by the piano will be

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50 Hz

100 Hz

150 HZ

250 Hz

Velocity of sound in any medium deepness upon.

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Elasticity

Density

Volume

Mass

In a spectrometer experiment monochromatic light is incident normally on a diffraction gratin having 4.5 x 10⁵ lines per metre The second order line is seen at an angle of 30^o to The normal What is the wavelength of the light.

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430 nm

556 nm

589 nm

625 nm

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

Which instrument measures properties of light over a specific portion of the electromagnetic spectrum.

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Photometer

Spectrometer

Hydrometer

Lactometer

Two waves of the same frequency and amplitude travelling in opposites directions along the same path in the same medium produce.

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Stationary waves

Transverse wave

Longitudinal waves

Compressional waves

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

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Remains unchanged

Decreases

Increases

Become zero

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

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