本题目来源于试卷: SME IB Physics Unit 4 Problems，类别为 IBDP Physics
[单选题]
A sound source $X_{1}$ is positioned $w \; cm$ to the left of sound source $X_{2}$. Both sound sources are $y \; m$ below the detection line $A B$. $A B$ runs parallel to $X_{1} X_{2}$. When a sound detector is slowly moved along the line $A B$, a maxima is first detected at $P$, followed by a minima at $Q$, with another maxima at $R$ and a minima at $S$. $P Q R S$ are all equidistant apart with $X_{1} S=X_{2} S$.
Which one of the following is a correct expression for the wavelength of the sound?
A. $X_{1} Q-X_{1} P$
B. $X_{1} R-X_{1} Q$
C. $X_{1} Q-X_{2} Q$
D. $X_{1} R-X_{2} R$
参考答案: D
本题详细解析:
暂无
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Post time 2024-1-26 22:03:40