If incandescent lightbulbs have a vacuum inside, why do they get so hot on the outside?

113

If incandescent lightbulbs have a vacuum inside, why do they get so hot on the outside?

@Epic2112 to

No Stupid Questions • 2 years ago

Shouldn’t the vacuum insulate the glass from the heat of the burning filament?

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@FiskFisk33
link
4•2 years ago
very closely related:

https://en.m.wikipedia.org/wiki/Black-body_radiation

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