Have you ever wondered how holiday laser light displays work? These laser holiday displays project hundreds of laser beams, but how can so many lasers fit into such a small package? You might be surprised to know these laser displays only need a single laser. They use something called diffraction gratings to diffract the one beam into many! Diffraction is the property of waves that allows the bending around corners. It’s a result of the waves getting bent from obstacles and edges they encounter.
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Have you ever wondered how holiday laser light displays work? …
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