Question # 1

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

Interference fringe spacing depends on

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The wavelength of light used

The distance screen from the coherent sources

Separation between the sources

All of the above

Which type of oscillations produce resoncance.

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Free

Forced

Damped

All of these

Which of the following is electromagnetic wave.

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X rays

Micro waves

Light

All of these

On loading the prong of a tuning fork with wax. Its frequency.

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Increases

Decreases

Remain unchanged

May increase or decrease

Mostly widely used types of gas LASER are.

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Neon

Argon ion

Helium

All of these

The amplitude of sound wave determines its

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Pitch

Loudness

Reverberation

Interference

X-rays eject electrons from matter by

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Pair production

Pair annihilation

Compton effect

Photoelectric effect

The phenomenon of polarization is done by

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Selective absorption

Scattering of light

Refraction of light

Dispersion of light

The apaceing between fringes is a Young's double slit pattern will be increased, if we decrease the

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Wavelength of the souce light

Distance from slite to screen

Width of the slits

Separation of the slits

X-rays are a part of electromagnetic spectrum and are characterized by frequencies higher that those of.

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Infrared radiation

Ultraviolet radiation

Far ultraviolet radiation

Far infrared radiation

Which of the following refers to the distance from crest to crest of a wave.

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Frequency

Wavelength

Amplitude

Period

The pitch of sound depends on its

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Wavelength

Frequency

Wave amplitude

Harmonic content

Electromagnetic waves are produced by

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Charge at rest

Accelerated changes

Heating a conductor

Electroplating

When a ray of light enters from rarer medium to a denser medium its wavelength.

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Increases

Decreases

Remain constant

Vanishes

Which of the following properties of light does not very with the nature of the medium.

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Amplitude

Frequency

Wavelength

Time period

Which of the following is an example of continuous spectra.

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Black body radiation spectrum

Molecular spectra

Atomic spectra

grating spectrum

Diffraction is a special type of.

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Polarization

Interference

Dispersion

Scattering

Beats are the results of.

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Diffraction of sound waves

Interference

Polarization

Timber

Newton's rings are formed due to

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Diffraction of light

Interference of light

Polarization of light

Reflection of light

Distance between two consecutive nodes or antinodes is equal to.

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Lamda /4

Lamda

Lamda /2

2 lamda

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