An Earth satellite in orbit emits a radio signal of constant frequency. Compared to the emitted frequency, the frequency of the signal received by a stationary observer will appear to be:

a) higher as the satellite approaches
b) higher as the satellite moves away
c) lower as the satellite approaches
d) unaffected by the satellite's motion

Question

An Earth satellite in orbit emits a radio signal of constant frequency. Compared to the emitted frequency, the frequency of the signal received by a stationary observer will appear to be:

a) higher as the satellite approaches
b) higher as the satellite moves away
c) lower as the satellite approaches
d) unaffected by the satellite's motion

stormfire1 · Answer

Due to the doppler effect the frequency will appear to be higher as the satellite approaches.