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Laser
Laser light sources is different in that it emits light of a coherent spatial coherence laser focus allows. tight spot, enabling applications such as archery, far too bright, allows the laser beam remains tight for long distances (parallelism, enabling applications with dance music water fountain. laser can be a temporary high consistency, allowing them to emit light with a very narrow range, they can emit a single color light. temporal coherence can be used to produce light pulses as short as the vemto.