Question # 1

On which characteristics the loudness of sound pends upon.

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Pitch

Speed

Wavelength

Amplitude

In a diffraction pattern, the width of any fringe is.

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Directly proportional to slit width

Inversely proportional to slit width

independent of slit width

Zero

When two waves travelling through the same medium arrive at the same point 180 ^o out of phase, they give rise to.

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Polarization

Destructive interference

Refraction

Constructive interference

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

We can hear beats when the difference in the frequencies of two sounding bodies is not more than.

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2

4

6

10

In which of the following the speed of sound will be maximum under similar conditions.

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N2

O2

CO2

H2

The main advantage of a grating over Young's apparatus is the

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Sharpness of the bright lines

Absence of dark fringes

Absence of bright fringes

Greater deviation of light

When amplitude of a wave becomes double its energy becomes.

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Xero

Double

4 times

6 times

On average there is no energy transfer in.

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Sound waves

Water waves

Standing waves

Mechanical waves

A monochromatic light beam when passed through a prism is.

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Diffracted

Devlated

Polarized

Dispersed

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

Newton proposed his corpuscular theory on the basis on

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Newton's rings

Polarization

Dispersion of white light

Rectilinear property of light

A sound wave is an example of

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Transverse wave

longitudinal waves

Hair wave

Stationary wave

Michelson's interferometer can be used to measure.

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Wavelength of light

Intensity of light

Amplitude of disturbances

Frequency of light

The energy transmitted per second though unit are held perpendicular to the direction of propagation of the wave is called.

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Intensity of sound

Pitch of sound

Loudness of sound

Quality of sound

Which of the following phenomenon occurs when two sound waves of equal amplitude and different frequencies travel through the same region.

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Doppler's effect

Resonance

Beats

Echo

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

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

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

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Microwaves

Radio waves

Infrared waves

^{Visible light}

Electromagnetic waves transmit.

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Energy only

Momentum only

Energy and momentum

Light

LASER is a device for

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Producing a beam of white light

Producing a beam of monochromatic and coherent light

Producing a beam of high intensity incoherent light.

Producing highly penetrating's X -rays

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