[填空题]
(a) Compare the shift in frequency if a 2000-Hz src*m1pvv j :d8f8qa: couj:. ds. l tt50yvax zv/yfr;,crce is moving toward you at 15 m/s versus you moving toward it at 15 m/s Are the two frequencies exactly the same? Aj5dz ;0f,atcxyvrt. .v y /l:sre they close? $f'_{source\,movine}$ Hz
$f'_{observe\,movine}$ Hz
(b) Repeat the calculation for 150 m/s and then again
$f'_{source\,movine}$ $ \times10^{ 3}$Hz
$f'_{observer\,movine}$ $ \times10^{ 3}$Hz
(c) for 300 m/s What can you conclude about the asymmetry of the Doppler formulas?$f'_{source\,movine}$ $ \times10^{ 3}$Hz
$f'_{observer\,movine}$ $ \times10^{ 3}$Hz
