21. Which is necessary for two sources of waves to be "coherent"?
(A) They are "in phase";
(B) They have the same amplitude;
(C) They have the same frequency;
(D) All;
(E) None.
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統計: A(0), B(0), C(1), D(1), E(0) #3188052
統計: A(0), B(0), C(1), D(1), E(0) #3188052
詳解 (共 2 筆)
#7407345
所以甚麼時候兩個波會相干
兩個條件達成即可
第一個相位差相等
第二個要有相同頻率
ㅤㅤ
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