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5 votes
Guys pls help me!!!!!!!!!

Guys pls help me!!!!!!!!!-example-1
User Darelle
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1 Answer

5 votes

Trough is the the lowest point of a wave

Amplitude is the highest point of a wave

Spectrum is the amount of vibration at each individual frequency

Doppler effect is the changes in frequency of any kind of sound or light wave produced by a moving source with respect to an observer

With that I think the answer is b, but do what you think.

Hope this helps
User Yshchohaleu
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4.3k points