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For sound waves, what's the phase and group velocity? Give numerical values.

For sound waves, what's the phase and group velocity? Give numerical values.

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Answer #1

Phase velocity :

The wave propagates with the velocity of the points that have the same phase position in space.

Phase velocity can be given as :

Cph= . = /K

The phase velocity ( speed of sound) of sound waves is : 331 m/s in air

Group velocity :

Group velocity is defined by the equation :

vg = /k

If is directly proportional to k , then group velocity would be equal to the phase velocity

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