After a chat with light transport fellows, I realized that it is not a well-known fact even among professionals that the entropy in the optical system cannot decrease (2nd law). That’s why you cannot start a fire from a moonlight using just optics https://what-if.xkcd.com/145/
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I think the color temperature of a reflector is not related to the surface temperature of the reflector, since it’s not a black body model anymore
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Funny how the space probes and astronauts we've sent to the moon did not combust, despite being exposed to a full hemisphere of supposed 4000K light.
(Color temperature is not temperature.) - 5 more replies
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Put that Fortnite money towards testing this please
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switch that the other way around..and you can start melting on the moon..time for
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