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The <strong>Doppler</strong> Effect for Sound<br />
Now the Flash starts running away from the radio.<br />
Since the frequency is f =1/T’, then we can write<br />
f " = 1# v $<br />
&<br />
%<br />
v S<br />
'<br />
) f<br />
(<br />
<strong>Doppler</strong> Effect in Cosmology 8