4 ms·
> They can be electrically charged but since they radiate they’ll shed their electric charge quickly This view is not right, e.g. electrons radiate and keep th
by snarfy 4y ago
> They can be electrically charged but since they radiate they’ll shed their electric charge quickly
This view is not right, e.g. electrons radiate and keep their charge. Black holes lose their electric charge when opposite charged matter falls in.
- deleted 4y ago[deleted]
- theptip 4y agoElectrons can’t lose their charge through radiation because they can’t have fractional charge. They radiate photons to lose momentum. (They can become uncharged by combining, eg e+P = N). A black hole can presumably radiate charged Hawkings radiation? I.e. if an electron-positron pair is created near the event horizon of a negatively-charged black hole then it would disproportionately capture positrons and repel electrons, thus radiating away its charge. (Could be wrong here, I’ve not looked into charged black holes before). I would assume here that charge radiates away at a different rate than mass, and by her statements it sounds like ch argue evaporates away quicker. She’s not making a general claim that “everything that radiates loses charge”, that would be silly.