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> [Neutrinos] have a mass of less than 0.45 electron volts, physicists report in the April 11 Science. For reference, a proton has a mass of 938.272 MeV and an
by mytailorisrich 2y ago
> [Neutrinos] have a mass of less than 0.45 electron volts, physicists report in the April 11 Science.
For reference, a proton has a mass of 938.272 MeV and an electron has a mass of 0.5110 MeV, so this is extremely 'light' in comparison, less than a millionth of an electron.