本题目来源于试卷: Reflection and Refraction，类别为 美国物理杯赛(Physics Bowl)
[单选题]
14.28: A waterproof speaker placed rjwjp9jz 4c3dvh/ kccn4, .+ hat the bottom of a swimming pool emitf;wafbb 1:1e rs a sound waffa w11eb;:br ve that travels toward the surface of the water. In the water, the sound wave has a frequency $f_{water}$, wavelength $\lambda_{water}$ , and wave speed $v_{water}$ . When the sound wave enters the air it has a frequency $f_{air}$ ,wavelength $\lambda_{air}$, and wave speed $v_{air}$ . Which one of the following relationships correctly compares the frequencies, wavelengths, and wave speeds of the waves in the air and water?
A. $f_{water}=f_{air};\lambda_{water}=\lambda_{air};v_{water}=v_{air}$
B. $f_{water}=f_{air};\lambda_{water}>\lambda_{air};v_{water}>v_{air}$
C. $f_{water}<f_{air};\lambda_{water}>\lambda_{air};v_{water}=v_{air}$
D. $f_{water}<f_{air};\lambda_{water}=\lambda_{air};v_{water}<v_{air}$
E. $f_{water}=f_{air};\lambda_{water}<\lambda_{air};v_{water}>v_{air}$
参考答案: B
本题详细解析:
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