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5 votes
The doppler effect is the change in observed frequency due to

a. the type of medium the wave is in
b. the type of wave
c. the original frequency of the source
d. the motion of the source or observer

2 Answers

4 votes

I believe the answer is D, im not 100% sure though.

User Terjetyl
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1 vote
d. the motion of the source or observer
User Richard Neumann
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