qazibasit Posted July 1, 2004 Posted July 1, 2004 Well if e=mc2 then mass of an atom should be change when the electrons change their orbit releasing energy because the mass is converting into energy.
Radical Edward Posted July 1, 2004 Posted July 1, 2004 Well if e=mc2 then mass of an atom should be change when the electrons change their orbit releasing energy because the mass is converting into energy. a little bit, yeap. the calculation does however have a ridiculously tiny number divided by a ridiculously large one.
swansont Posted July 1, 2004 Posted July 1, 2004 a little bit, yeap. the calculation does however have a ridiculously tiny number divided by a ridiculously large one. Wouldn't the "ridiculously" cancel out, then? c2 is almost 1 GeV, and electron transitions are of order 1 eV, so the mass change is (very) roughly a part in 109
Martin Posted July 1, 2004 Posted July 1, 2004 c2 is almost 1 GeV' date=' ...[/quote'] holy smoke swanson you are obviously a working physicist nobody else can be so casual more straightlaced folks would say that Mc2 is almost 1 GeV, where M is the mass of a proton or of a hydrogen atom, which is pretty much the same thing and be a bit timid about equating c2, which is the square of a velocity, with an energy. but for sure one billionth is the right order of magnitude! that's what matters
Martin Posted July 1, 2004 Posted July 1, 2004 c=h=1 for a lot of folks I know... Go Planck! just one little constant more and its c=hbar=G=1
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