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A-star

A nice insight that anything moving generates light. In what part of the electromagnetic spectrum does the light generated by say a human body lie?

OtB_BlueBerry

By Wien's displacement law, a human body, if assumed a black body, radiates with a peak wavelength of around 1e-5m, which is IR.

https://en.wikipedia.org/wiki/Planck's_law

https://en.wikipedia.org/wiki/Wien's_displacement_law