Wave Behavior C.3 Refraction Diffraction Superposition Interference (id: c5de866

本题目来源于试卷: Wave Behavior C.3 Refraction Diffraction Superposition Interference，类别为 IB物理学

[填空题]
A speaker emits sound waves toward a boundary between dry, cool air and moist, hot air. The speed of sound in the dry air is $340m{s}^{-1}$ and speed of sound in the moist air is $375m{s}^{-1}$. Three wavefronts enter the boundary with an angle of ${51}^{\circ }C$ as shown.


1.Draw lines to show wavefronts in the moist air.
2.For the sound traveling in the moist air, calculate the angle between the wavefronts and the boundary. θ =    ${}^{\circ }C$
3.Now the moist air region has been replaced with another medium $X$. Determine the minimum speed of sound in the medium $X$ so sound cannot enter. v =    $m{s}^{-1}$

参考答案:
空格1: 59±2%  空格2: 437±2% 


本题详细解析:

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