Fewpal
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What are wavelength, frequency, time period and amplitude of a sound wave?

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Wavelength: The distances between two consecutive compressions or rarefaction of a wave. Its S.I unit is meter. 

Frequency: One compression and one rarefaction constitutes one vibration. The number of vibration in a second is called frequency. Its unit is Hertz. 

Amplitude: When waves are produced, the particles vibrate about their mean position. The maximum displacement from its mean position of a particle is called its amplitude. It is measured in meters. 

Time period: The time taken by the wave to complete one oscillation i.e., the time between two consecutive compressions or rarefactions is called time period.

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