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声音是物体振动产生的机械波,物体振动可以发出声音。光是电磁波,可见光的频率为4.2×10~(14)Hz~7.8×10~(14)Hz,人耳无法直接听到。本文借助光声瓶(瓶内部涂有部分炭黑层)在光的照射下通过炭黑层的热胀冷缩带动边界层空气振动,利用DISLab传感器,通过无光和有光时的分贝与波形对比,直观、形象地“聆听”光的声音。
Sound is a mechanical wave generated by the vibration of the object, the object vibration can make a sound. Light is electromagnetic waves, the visible light frequency of 4.2 × 10 ~ (14) Hz ~ 7.8 × 10 ~ (14) Hz, the human ear can not directly hear. In this paper, with the help of the photoacoustic bottle (the inner part of the bottle is coated with some carbon black layer), the boundary layer air vibration is driven by the thermal expansion and contraction of the carbon black layer under light irradiation. By using the DISLab sensor, Contrast, visual, vivid “Listen ” light sound.