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Well, jh Send a noteboard - 19/05/2019 04:43:57 PM

View original postI think he understands physics better than that. I think a photon with the properties Shrike describes will produce 'green' light independent of the medium through which that photon travels.

well, no. to be fair, I was a bit rushed in my comment, but as I am currently trying to teach kids about things like this - the frequency of the light will be the same, but the wavelength, as Olof said, will change, and therefore, a 400nm violet light will in for example water have a wavelength of 300nm, as the speed of light is lower in said medium.

However, there are a few interpretations which could screw this up, the main objection being something about statistics, a photon travelling through water without interacting with the water for whatever reason would not have a shorter wavelength... but hey, let's leave quantum mechanics out of this.

"People think it must be fun to be a super genius, but they don't realize how hard it is to put up with all the idiots in the world" - Calvin.
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