Question # 1

Good acoustic implies

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Obtaining as much reverberations as possible

Making the reverberation as small as possible

Obtaining the optimum of reverberations

Eliminating reverberations

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

In case of stationary waves every particle of the medium has fixed

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Velocity

Displacement

Amplitude

Phase

The phenomenon of interference comes about because waves obey

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the impulse momentum theorem

An inverse square law of intensity

The principle of reciprocity

The principle of super position

Huygen's wave theory falls to explain

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Diffraction

polarization

Interference

Refraction

What is shapes of a pure note

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Sinwave

Sawtooth

Square wave

Triangular wave

Newton's rings are experimentally derived from the phenomenon of.

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Polarization of light

Resolution of light

Interference of light

Diffraction of light

A water wave is an example of

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Electromagnetic wave

Longitudinal wave

Transverse wave

Reverberation

X-rays eject electrons from matter by

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Pair production

Pair annihilation

Compton effect

Photoelectric effect

A sound wave is an example of

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Transverse wave

longitudinal waves

Hair wave

Stationary wave

The ratio of intensities of two sound waves is 4 : 9 what will be the ratio of their amplitudes.

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9:4

2:3

3:2

4:9

Balimer series lies in the

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Visible region

Invisible region

Infrared region

Far infrared region

One of the device to produce plane polarized light is.

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A prism

A bi prism

A plane mirror

A nicol prism

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

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Microwaves

Radio waves

Infrared waves

^{Visible light}

The locus of all points in the same state of vibrations are known as.

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half period zone

A wavefront

A half wave zone

A full wave zone

The wave phenomenon that classifies light as a transverse wave is.

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Polarization

Diffraction

Interference

Refraction

The loudness of a sound deepness on its

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Wavelength

Frequency

Wave amplitude

Regularity

Which of the following properties of sound is affected by change in air temperature.

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Amplitude

Intensity

Frequency

Wavelength

Which of the following characteristics of a wave is independent of the others.

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speed

Frequency

Amplitude

Wavelength

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

Which form of electromagnetic radiation is used in RADAR.

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Long wavelength ultraviolet waves

short wavelength microwaves

short wavelength infrared wave

Long wavelength radiowaves

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