Physics
Sound in air propagates in form of:
- Longitudinal wave
- Transverse wave
- Both longitudinal and transverse wave
- Neither longitudinal nor transverse wave
Sound
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Answer
Longitudinal wave
Reason — The two kinds of waves in form of which sound travels in a medium are:
- Transverse waves — The wave in which the particles of medium vibrate about their mean positions, in a direction perpendicular to the direction of propagation of the wave.
Transverse waves can only be produced in solids and on the surface of liquids. They cannot be produced inside liquids and inside gases. - Longitudinal waves — The wave in which the particles of medium vibrate about their mean positions, in the direction of propagation of sound.
Longitudinal waves can be produced in solids, liquids as well as gases.
Hence, sound in air propagates in form of longitudinal wave.
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Related Questions
Identify the correct statements :
(i) A material medium is necessary for the propagation of sound from one place to another.
(ii) The medium must have inertia.
(iii) The medium must be inelastic.
(iv) The medium must be frictionless.
- (i) and (ii)
- (i), (ii) and (iii)
- (i), (ii) and (iv)
- (ii), (iii) and (iv)
The correct statement is:
- Sound and light both require medium for propagation
- Sound can travel in vacuum, but light cannot
- Sound needs medium, but light does not need medium for it's propagation
- Sound and light both can travel in vacuum
The S.I. unit of wavelength is :
- metre
- hertz
- second
- m/s
The position of maximum upward displacement of medium particles in a transverse wave is known as :
- trough
- compression
- rarefaction
- crest