The E = mC ^ 2, if the various research into ultra-high frequency from a few hertz to the optical information (E) input of test instruments or human facial features (=), then the output of electromagnetic waves from the right of the equal sign (C ). If this subdivision spectrum of electromagnetic waves, including sound waves, radio waves, microwaves, infrared light, sun shadow (people mistakenly call "visible light"), UV, X-rays, gamma rays, cosmic rays.
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