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Derivation of Doppler Effect Frequency Equations

by Ron Kurtus (30 November 2012)

Take this Mini-Quiz to check your understanding of the lesson material.



1. What is the general Doppler Effect frequency equation?

fO = fS(c − vO)(c − vS)

λO = λS(c + vS)/(c − vO)

fO = fS(c − vO)/(c − vS)

2. How is the frequency equation determined when the source is moving toward a stationary observer?

You set vS = 0

You set vO = 0

You set fO = 0

3. What is the change in frequency when the observer moves toward a stationary source?

Δf = vOfS/c

Δf = −fS vS/(c − vS)

Δf = −vOfS/c

If you got all three correct, you are on your way to becoming a Champion in Physics. If you had problems, you had better look over the material again.


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