Question # 1

Two light waves which are not coherent cannot produce.

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Interference

Diffraction

Reflection

Dispersion

Maximum number of orders available with a grating is.

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Independent of grating element

Directly proportional to grating element

Inversely proportional to grating element

Directly proportional to wavelength

A wave which consists of a single, non repetitive disturbance is called a

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Continous wave

Pulse

Longitudinal wave

Transverse wave

The loudness of a sound depends on its

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Wavelength

Frequency

Wave amplitude

Regularity

Which of the following is a mechanical wave.

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X rays

Radio waves

Sound wave

Light wave

Which of the title for combining of notes that produce jarring effect on the ear.

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Noise

Melody

Harmony

Discord

Michelson's interferometer can b e sued to find

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Velocity of light

Velocity of sound

Wavelength of light

Wavelength of sound

Laser light is considered to be coherent because it consists of.

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Many wavelengths

Uncoordinated wavelengths

Coordinated waves of exactly the same wavelength

Divergent beams

Light wave can be polarized because they

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Are transverse in nature

Can be reflected

Have short wavelength

Have high frequncies

The fundamental frequency of a sound source is 256 Hz. What is the frequency of the first harmonic.

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64

128

256

512

Diffraction is the property according to which light waves.

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Change their direction on entering a different medium

Produce chemical effects

Bend round the corners

Bend towards the centre

X-rays eject electrons from matter by

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Pair production

Pair annihilation

Compton effect

Photoelectric effect

A large ripple tank with a vibrator working at a frequency of 30 Hz produce 25 complete waves in a distance of 50 cm. The velocity of the wave is.

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9.53 cm s-1

60 cm s-1

750 cm s-1

1500 cm s-1

Stationary waves only a discrete set of frequencies are set up in a medium. This fact is called.

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Harmonics

Overtones

Quantization of frequencies

Superposition of frequencies

On average there is no energy transfer in.

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Sound waves

Water waves

Standing waves

Mechanical waves

When stationary waves are formed in a closed organ pipe.

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A node is formed at the closed end of the pipe

An antinode is formed at the closed end of the pipe

Each particle at the node experience zero acceleration

The maximum pressure occurs at the nodes

The penetrating power of X rays is least with materials of.

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High mass density

High volume density

High electron density

High weight

Beats occurs because of.

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Reflection

Refraction

Interference

Doppler's effect

All particles, of a wave front vibrate

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In same phase

In opposite phase

Upward down

Left and right

The ripple tank is used to study various features of

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Wave phenomenon

Interferences

Doppler's effect

Reverberation

For how long the sensation of sound persists in our brain.

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0.1 s

0.2 s

0.3 s

0.4 s

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