Q60 of 199 Page 186

What is sound? What type of waves are sound waves in air?

Sound is a form of energy which gives the sensation of hearing waves. Sound waves are longitudinal waves.


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58

The frequency of the sound emitted by the lioudspeaker is 1020 Hz. Calculate the wavelength of the sound wave in air in cm where its velocity is 340 m/s.

 59

What is the difference between a compression and a rarefaction in a sound wave? Illustrate your answer with a sketch.

 60

Describe an experiment to show that sound cannot pass through vacuum.

 61

How is sound produced? Explain with the help of an example.