本题目来源于试卷: SME IB Physics Unit 4 Problems，类别为 IBDP Physics
[单选题]
$\mathrm{K}$ is the source of a wave of frequency $25 \mathrm{~Hz}$.  The wave travels to point $M$ by two routes, $K \rightarrow L \rightarrow M$ and $K \rightarrow M$. The speed of the wave is $15 \mathrm{~m} \mathrm{~s}^{-1}$. What is the path difference between the two waves at M in terms of the wavelength $\lambda$ of the waves?
A. $4 \lambda$
B. $6.6 \lambda$
C. $31.6 \lambda$
D. $2.4 \lambda$
参考答案: B
本题详细解析:
暂无
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Post time 2024-1-26 22:03:40