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电子震荡产生电磁波，当电磁波的辐射达到一定的频率时，就会出现可见光。
光是粒子震动波，具有波粒二象性。
光是一种能量，光剑是把这种能量凝固在一个范围内，或者说这个能量源源不断地从发出器里面生出，但是并没有强大到可以脱离一个范围的地步。就像火焰有它的形态一样。
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我還不明白的是，光和火都是可穿透的，為甚麼光劍不能?
你可以把光劍想像成一個伸縮光管，又或是一個微型噴泉，噴出來的水會發光。
光劍所凝聚的不是光，而是一堆會發光的物質。
光能否穿透，要看媒介是什麼。