Question # 1

Reverberation is the

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Presence of large number of overtones

presence of harsh and discordant notes

Presence of ultrasonic vibrations

Persistence of audible sound after the source has stopped

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

Palaroids can be used

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To control headlight glare in right driving

To determine the concentration of the optically active substances

In curtain less windows to adjust the amount of light

all of the above

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

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Angle

Time

Length

Temperature

The addition of two or more waves is termed as

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Interferences

Period

Echo

Polarization

Two waves which combine to produce a resultant by reinforcing each other of every point demonstrate.

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Destructive interference

constructive interference

Refraction

polarization

Huygen's concept of secondary waves.

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Allow us to find the focal length of a thick lens

Is a geometrical method to find a wave front.

Is used to determine the velocity of light

Is used to explain polarization

According to Huygen's principle

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Light bends round corners

Light travels in a straight line

All points on primary wave front are considered centre of distances

Light has wave nature

The amplitude of a vibrating body at resonance place in vacuum is.

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zero

Maximum

Minimum

Infinite

Three tuning forks of frequencies 400 Hz. 401 Hz and 402 Hz are sounded together The frequency of beats per sound is.

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0

1

2

3

When light enters glass from air it suffers a change in.

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Wavelength

Wave front

Velocity

All of these

The energy following per second through a unit area held perpendicular to the direction of wave is.

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The loudness of the sound waves

The pitch of the sound waves

The intensity level of sound waves

The intensity of sound waves

A LASER beam may be used to measure very large distance because it is.

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Unidirectional

Coherent

Monochromatic

Massive

Longitudinal waves cannot be

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Reflected

Difracted

Dispersed

Polarized

The unit of intensity level is.

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Watt

Joule

Bel

Sabin

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

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