問題詳情

53.tAn observer is moving with speed u toward a stationary source which emits sound waves of
frequency f. What is the frequency f' heard by the observer? Assume the speed of sound to be v.
(A)f'=ft
(B)

t
(C)


(D)


(E)

參考答案

答案：B

統計：A:0,B:1,C:0,D:0,E:0

難度：計算中