指星笔发出的光为什么可以在空中显示光路,而镭射激光(即通常的教鞭)不行?两种激光有什么区别?
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![指星笔发出的光为什么可以在空中显示光路,而镭射激光(即通常的教鞭)不行?两种激光有什么区别?](/uploads/image/z/12313089-9-9.jpg?t=%E6%8C%87%E6%98%9F%E7%AC%94%E5%8F%91%E5%87%BA%E7%9A%84%E5%85%89%E4%B8%BA%E4%BB%80%E4%B9%88%E5%8F%AF%E4%BB%A5%E5%9C%A8%E7%A9%BA%E4%B8%AD%E6%98%BE%E7%A4%BA%E5%85%89%E8%B7%AF%2C%E8%80%8C%E9%95%AD%E5%B0%84%E6%BF%80%E5%85%89%EF%BC%88%E5%8D%B3%E9%80%9A%E5%B8%B8%E7%9A%84%E6%95%99%E9%9E%AD%EF%BC%89%E4%B8%8D%E8%A1%8C%3F%E4%B8%A4%E7%A7%8D%E6%BF%80%E5%85%89%E6%9C%89%E4%BB%80%E4%B9%88%E5%8C%BA%E5%88%AB%3F)
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