Question # 1

Which of the following represents an elastic wave.

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Light waves

Radiowaves

X-rays

Sound waves

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

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Tuning fork

Flute

Drum

Harmonium

The interference between two sounds of slightly differed frequency is

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shock wave

Beats

Sonic boom

Doppler's effect

The unit of intensity level is.

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Watt

Joule

Bel

Sabin

The wavelength of Pascha series lies is the

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Visible region

Ultraviolet region

Infrared region

Invisible region

Soap film in sunlight appears coloured due to

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Dispersion of light

Diffraction of light

Scattering of light

Interference of light

A plane of polarization is one in which

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vibrations take place

No vibrations take place

Longitudinal vibrations take place

Transverse vibrations take place

The ratio of the velocity of sound in hydrogen to the velocity of sound in oxygen is

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4:1

16:1

2:1

8:1

Infrared radiation is also known as

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Radio signals

Heat radiation

Magnetic resonance waves

RADAR

The unit of intensity of sound waves is.

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W m-1

W m-2

N m-1

N m-2

Light wave are

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Longitudinal

Transverse

Sometimes longitudinal and sometimes transverse

Neither longitudinal nor transverse

The energy transported by a wave is proportional to the square of the.

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Wavelength of the wave

Period of the wave

Amplitude of the wave

Frequency of the wave

Which of the following forms of electromagnetic energy has the longest wavelength.

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Microwaves

Radio waves

Infrared waves

^{Visible light}

Air bubble in water shines because of

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Reflection

Refraction

Diffraction

Total internal reflection

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

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

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