From Wikipedia, the free encyclopedia
激光，又叫雷射、鐳射（如亞洲電視節目【鐳射劇場】）（音譯自laser），係狹幅頻率嘅光輻射線，通過受激輻射放大而得嘅必要反饋共振，產生准直、單色、相干嘅光束。發射激光嘅光學儀器叫激光器。
激光器，又叫雷射器，係可以發射激光（雷射）嘅儀器。
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