Scientists Say: Biophoton

Biophoton (noun, “BY-oh-foh-tawn”)

Though it cannot be seen with the naked eye, all living things give off extremely dim light. The light particles, or photons, making up this glow are called biophotons.

Biophotons fall within the range of “visible light.” That is light with wavelengths our eyes can see. But the glow of biophotons is so faint that scientists need very sensitive instruments to detect it. Each square centimeter (0.15 square inch) of a person’s skin, for instance, gives off only around 1,000 photons per second. A firefly is about a million times as bright.   

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