No Stupid Questions@lemmy.world · 1 year ago

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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TonyTonyChopper@mander.xyz
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1 year ago
It does do that though. My vacuum thermos keeps things hot or cold for like 6 hours

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