If the electromagnetic spectrum were a piano keyboardÖ..
the visible region would be just one key!
power induction Radio IR Vis UV X-rays gamma cosmic
wavelength, nm 10 16 10 14 10 12 10 10 10 8 10 6 10 4 10 2 1 10 -2 10 -4 10 -6 10 -8 nm
frequency, Hz 10 2 10 4 10 6 10 8 10 10 10 12 10 14 10 16 1018 10 20 10 22 10 24 10 26 Hz
700 600 500 400 nm
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