No Stupid Questions@lemmy.world · 1 year ago

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

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

Epic2112@lemmy.world to

No Stupid Questions@lemmy.world · 1 year ago

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

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1 year ago
“Halogen” bulbs are just incandescent bulbs filled with inert gas and a small amount of bromine or iodine. Very interesting chemistry https://en.wikipedia.org/wiki/Halogen_lamp

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