Question # 1

Standard metal according to Michelson's interferometer is equivalent to

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1553163.5 wave meter

3 x 108meter

15503000 meter

None of these

The process of confining the beam of light to vibrate in one plane is called.

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Interference

Diffraction

Polarization

Total internal refraction

A system does 600 J of work and at the same time has its internal energy increased by 320 J. How much heat has been supplied.

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28o J

920 J

600 J

200 J

The periodic variations of sound between maximum and minimum loudness are called.

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Doppler's effect

reflection

Laplace correction

Beats

The error in speed of sound calculated by Newton at STP is about.

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0 %

14 %

15 %

16 %

When velocity time graph is a straight line parallel to time axis then

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Velocity is zero

Acceleration is constant

Acceleration is zero

Velocity is variable

A bullet shot straight up, return to its starting point in 10 sec. Its initial speed was

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9.8 ms-1

24.5 ms-1

49 ms-1

98 ms-1

An oscillating mass-spring system produces

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Sound waves

Electromagnetic waves

Light waves

Periodic waves

Watt -m2 is the unit of

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Energy

Intensity

Power

Work

According to Huygen's principle the points on primary wave front can be considered as

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Secondary wavelets

Ray of light

Source of light

None of these

Waves transport energy without transporting

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Matter

Force

Momentum

All of these

Velocity of sound is independent of

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Temperature

Density

Pressure

Medium

A communication satellite is used ot reflect the signal of.

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Microwaves

Radio waves

y rays

x -rays

The distance between two consecutive crests of troughs is called

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Time period

Wave length

Frequency

Displacement

Angular displacement is

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Scalar quantity

Vector quantity

Basic quantity

None of these

Air blows from

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High pressure to low pressure

Low pressure to high pressure

Low temperature to high temperature

High temperature to low temperature

The branch of Physics wich deals with velocities approaches the velocity of light is called

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Quantum Physics

Relati vistics Mechanics

Wave Mechanics

None of these

The time rate of change of angular displacements called.

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Linear velocity

Linear speed

Angular velocity

Angular speed

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