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Optics is the study of light, and its interaction with matter. It includes topics such as imaging systems, fiber optics, lasers, quantum optics, and more.

10 votes
3 answers
2k views

Why use lasers for intense, localized heat instead of some other light source?

Lasers are used in various industrial processes that need intense, localised, heat (3d printers and laser cutters come to mind). My question is: why use lasers? There are many other (cheaper, brighte …
BenRW's user avatar
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6 votes

As with infrared pictures, would it be possible to see 2.4GHz waves as light?

That is absolutely something you can do, and it has been done: https://www.rtl-sdr.com/generating-a-wifi-radio-heatmap-with-a-helical-antenna-antenna-rotator-and-a-hackrf/ The everyday world looks a …
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