[填空题]
(a) Compare the shift in frequen,yx2 s)hxu1a gcy if a 2000--uxdu.wp3rpp)9, ll fHz source is moving toward you at 15 m/s versus you moving top dl -3,.fux )up9wlprward it at 15 m/s Are the two frequencies exactly the same? Are 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
