Apure sound wave, generated by a tuning fork, is considered a periodic wave. which statement is true for this tuning fork sound wave?

a. the wave pattern repeats itself after every two waves.
b. every wave has the same wave pattern.
c. the amplitude of the waves increases after every subsequent wave.
d. no two waves have the same wave pattern.

Answer : Every wave has the same wave pattern.

Explanation : A pure sound wave has a single frequency and its generated by a tuning fork . The sound wave is a  simple periodic wave.

When an object such as a guitar push and pull on the around it. When it pushes on the air, then the pressure increases and when it pull on the air,  then the pressure decreases and sound waves are formed.

Hence, sound wave has the same wave pattern.  

Option B

Explanation:

A periodic wave has repeating pattern depending on which the wavelength and frequency of the wave can be determined. A pure sound wave which is generated by a tuning fork, considered as a periodic wave has the same wave pattern for every wave.

Thus, option B is correct.

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