Lasers are known for the monochromatic nature of their light, so much so that you might never have thought there could be such a thing as a white laser. But in the weird world of physics ...
In the name of due diligence, we checked it out on Wikipedia: ‘The Photoacoustic Effect’, and indeed it is real – first discovered in 1880 by Alexander Bell! The pulsing light is heating the ...
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