Physics
The S.I. unit of wavelength is :
- metre
- hertz
- second
- m/s
Sound
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Answer
metre
Reason — The distance travelled by the wave in one time period of vibration of a particle of the medium, is called its wavelength. Its S.I. unit is metre.
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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
Sound in air propagates in form of:
- Longitudinal wave
- Transverse wave
- Both longitudinal and transverse wave
- Neither longitudinal nor transverse wave
The position of maximum upward displacement of medium particles in a transverse wave is known as :
- trough
- compression
- rarefaction
- crest
The wave in which the particles of a medium vibrate about their mean position in a direction …………… to the direction of propagation of the wave is called transverse wave.
- parallel
- similar
- perpendicular
- none of the above