Wednesday, October 24, 2018

Is our skin colour evidence of Einstein's photoelectric effect and the (energy of the) UV photon?

I think I touched on something profound today in class: is our skin colour evidence of Einstein's Nobel Prize work, the photoelectric effect and the (energy of the) photon? What he established was 'light' photons increase in energy, in punch, as the frequency increases, and particularly after the ultra-violet (pardon the pun 'particularly' - he is the father of Quantum mechanics in the same work he he).
Before the UV frequency the energy of the visible light, the IR (heat), microwave, and radio - diminishing to being very weak. Our skin colour, from this work by Dr Nina Jablonski, is determined by our ancestral exposure, or not, to UV - it's UV that kills us, and we adapted/evolved colour to protect us.
You may ask why we were talking about this in econ? It was to do with health systems and merit goods - here's to them.


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