問題詳情
22. Three sinusoidal waves of the same frequency travel along a string in positive direction of an x axis. Their amplitudesare y1 ,y1/ 2and y1/3 , and their phase constants are 0, π/2, and π, respectively. What is the phase constant of resultantwave?
(A) 30°
(B) 37°
(C) 45°
(D) 53°
(E) 60°
參考答案