本题目来源于试卷: The Wave Nature of Light，类别为 通用国际物理
[问答题]
We can hear sounds around cornjshjt5.0l t:3 l wa:duers, but we cannot s)+juy8p 3:r6dnwh gg bee around corners; yet both sound and light are waves. Explain the djnrg6p:+8y3 g dbw) huifference.
参考答案:
The main reason that we can
hear sounds around corners, but not see around corners, is diffraction. Sound waves have very long wavelengths when
compared to light waves, which makes diffraction effects much more
obvious. Diffraction effects are very
noticeable once the size of the object that the wave is diffracting around is about
the same size as the wavelength of the wave.
The wavelength of sound is on the order of 1 m, while the wavelength of
light is on the order of 0.1 mm. A secondary
reason is reflection. Sounds waves
reflect off of walls very well in a specular manner, and so can bounce around
corners, but light reflects off of the walls in a very diffuse manner.
本题详细解析:
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