They are called quantum because it takes a packet of energy of a very specific size - a quantum - to create the states.
BBC: Neutrons could test Newton's gravity and string theory
What, after all, is the replacement cost of a packet of dense, easily transportable energy that formed over hundreds of millions of years?
FORBES: Why A Piece Of Pristine Coral Is Like A $20 Bill
The energy of a packet of light -- or "photon" -- is inversely proportional to its wavelength.
CNN: Why gamma-ray burst shocked scientists
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