Question # 1

The phenomenon of beats takes place due to

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Longitudinal waves

Transverse waves

Stationary waves

Both a and b

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 unit of intensity of sound waves is.

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W m-1

W m-2

N m-1

N m-2

Blue colour of sky is due to.

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Diffraction

Reflection

Polarization

Scattering

The velocity of sound will be greater in.

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Air

Water

Solids

Vacuum

The unit of intensity level is.

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Watt

Joule

Bel

Sabin

On which characteristics the loudness of sound pends upon.

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Pitch

Speed

Wavelength

Amplitude

The phenomenon of interference occurs because waves obey

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Laws of reflection

Principle of super position

Laws of motion

Inverse square law of intensities

When a newton's right interference pattern a viewd from above by means of reflected light , the central spot is

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Multicoloured

Alternately white and black

Bright

Dark

The wavelength of Pascha series lies is the

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Visible region

Ultraviolet region

Infrared region

Invisible region

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

The polarization of an electromagnetic wave is determined by

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The magnetic field

The electric field

The electric and magnetic fields

The field direction of propagation of electromagnetic waves

Ultrasonic sound waves

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Can be heard by a normal human ear

Can be heard with the help of hearing apparatus

Can be heard with the help of microphone

cannot be heard

The dispersive power of a grating is

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Light used

Separation of lines

Frequency of light used

Independent of wavelength

The speed of a sound wave is independent of

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Nature of medium

Pressure

Temperature

Mass and energy

Which of the following is nearly monochromatic light.

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Light from fluorescent tube

Light from neon lamp

Light from sodium lamp

Light from simple lamp

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

Which characteristics successively increases in the musical scale.

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Pitch

Quality

Loudness

Amplitude

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

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Microwaves

Radio waves

Infrared waves

^{Visible light}

The use fulness of x rays is largely due to their

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Mass

Density

Penetrating power

Rest mass

A polaroid is

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A red light filter

A device used for a analyzing polarized light

A device used in polarimeter

An adjustable shutter

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