Doppler Effect With Reflection
A bat flying at 8 m/s toward a stationary wall emits ultrasonic waves of frequency 50 kHz. The waves reflect off the wall and return to the bat. Assuming the speed of sound is 340 m/s, what is the frequency of the echo as detected by the bat?
A
52.4 kHz
B
51.2 kHz
C
54.8 kHz
D
50 kHz
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