Question

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

Answer 1

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• Frequency: The number of compressions or rarefactions taken together passing through a point in one second is called frequency.
• Time Period: It is the time taken by two consecutive compressions or rarefactions to cross a point.
• Amplitude: It is the magnitude of maximum displacement of a vibrating particle about its mean position.

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Answer 2

Answer:

Air is the commonest material through which sound propagates. When school bell is rung, it pushes the molecules of the air in front of it. This in turn compresses the air, thus creating a region of high pressure and high density called compression. This compression in the air travels forward. When the bell moves back, it creates a region of low pressure in the air, commonly called rarefaction. This region has low pressure, low density, and more volume. As the bell continues to vibrate, the regions Of compression in the air alternate with the regions of rarefaction. These regions alternate at the same place. The energy of vibrating bell travels outward. This energy which reaches the ears, makes the eardrums to vibrate and thus we hear sound.

Explanation: