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James Clerk Maxwell (1831-1879) skal ha hevdet:
"In speaking of the Energy of the field, however, I wish to be understood literally. All energy is the same as mechanical energy, whether it exists in the form of motion or in that of elasticity, or in any other form. The energy in electromagnetic phenomena is mechanical energy."
Jeg gjetter at elektroner har bevegelsesenergi når de beveger seg i elektronbaner.
Når et elektron skifter til en bane utenfor, vil hastigheten avta og energi frigjøres (kvant)
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