If a Doppler radar weather report indicates that clouds are approaching you, the waves received by the Doppler radar must be___________ the waves sent out by the radar.
A. higher in wavelength than
B. higher in frequency than
C. The same frequency as
D. lower in both wavelength and frequency than

Question

If a Doppler radar weather report indicates that clouds are approaching you, the waves received by the Doppler radar must be___________ the waves sent out by the radar.
A. higher in wavelength than
B. higher in frequency than
C. The same frequency as
D. lower in both wavelength and frequency than

anonymous · Answer

I think it's B, but I'm not sure.