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I am not quite understanding why the answer can include interference. Doesn't interference mean that two different waves combine with each other?
The answer is C.
When the passage says "insect’s beating wings introduce oscillating frequency and amplitude shifts into the returning echo", does this mean that the insect's beating wings are creating a new wave in addition to the one emitted by the bat? And these two waves combine together during the doppler shift when going back to the bat?
The answer is C.
When the passage says "insect’s beating wings introduce oscillating frequency and amplitude shifts into the returning echo", does this mean that the insect's beating wings are creating a new wave in addition to the one emitted by the bat? And these two waves combine together during the doppler shift when going back to the bat?