@Epic2112 to No Stupid Questions • edit-21 year agoIf incandescent lightbulbs have a vacuum inside, why do they get so hot on the outside?message-square51arrow-up1116arrow-down13file-text
arrow-up1113arrow-down1message-squareIf incandescent lightbulbs have a vacuum inside, why do they get so hot on the outside?@Epic2112 to No Stupid Questions • edit-21 year agomessage-square51file-text
minus-square@FiskFisk33link80•edit-21 year agoVacuum means no convection heat. It however does not mean no radiation heat. The filament radiates heat through vacuum the same way the sun does. Additionally, theres not vacuum in buldbs, but inert gas, like argon.
minus-square@AnUnusualReliclink7•1 year agoThere no longer is a vacuum in bulbs, but there was for a very long time.
minus-square@[email protected]linkfedilink9•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
Vacuum means no convection heat. It however does not mean no radiation heat. The filament radiates heat through vacuum the same way the sun does.
Additionally, theres not vacuum in buldbs, but inert gas, like argon.
There no longer is a vacuum in bulbs, but there was for a very long time.
“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