Vacuum insulated vessels prevent heat transfer by conductive (through the material) and convective (air/fluid cooling moving across substance carrying heat).
This one is transparent, so radiative energy (visible light) goes right though the walls and hits whatβs inside, where itβs absorbed and converted to heat. That heat remains mostly inside.
If most of the solar spectrum was infrared, wed have evolved to see it instead of the visible spectrum. We see the visible spectrum because its most effective to do so in sunlight.
Brevis-ClausNaughty/Nice
under the chimney
9 1yr ago#3864131
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Thats not how heating objects with radiation really works, although for the earth in total only about half is directly infrared. Uv has way more energy than infrared - no one is getting warm from x-rays.
Without the source im not 100% but im pretty sure that image is implying that at locations people generally live, most heating is infrared.
Its pedantic anyways, bard is close enough for it to not matter
Quickbeamthey/them
Bitten by a radioactive calico
9 1yr ago#3863238
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Give him a break. Steve used to remember the visible light spectrum by reciting Roy G Biv but since losing his family, having a mental breakdown, and becoming unemployable, it's now Reine G Biv.
The person who Bardfinn responded to perfectly described a Dewar. If you haven't seen one of these thingies, it's a big butt metal thermos. It's double-lined, and the air in between has been sucked out to be a vacuum, so that very little heat gets in or out, and the stuff inside stays the right temp. Pretty common to store liquid nitrogen in it.
It's been a while since I've given a shit about physics, but I'm pretty sure solar ovens rely on a curved reflective surface to focus sunlight into a more concentrated area, kinda like using a magnifying glass to fry ants but that's with a lens and not a mirror. Then the light hits something else and it gets fkn hot, ya know like an ant. Then through the power of magic, visible light enters the cooker and infrared stays in because something something.
cirnocir/no 1yr ago#3864263
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>Itβs a sock puppet account for a neoNazi stalking and harassing me, or else itβs a sock puppet account of the s*x pest I told βNoβ four years ago and who has been stalking and harassing me.
automemethey/them
This account is verified because they are subscribed to Twitter Blue and verified their phone number
1yr ago#3862638
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No sexualizing minors, even as a joke. This includes cartoons.
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Neighbor explains things in the most patronizing tone possible and still manages to get the basic details wrong
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Not necessary infos
Except most of the heat is from infrared.
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most of it is visible actually!
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You're probably right. I got fooled by the whole infrared = heat thing.
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that's a common misconception people have that comes from fire making most of its heat in infrared! all light carries heat in reality
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If most of the solar spectrum was infrared, wed have evolved to see it instead of the visible spectrum. We see the visible spectrum because its most effective to do so in sunlight.
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blackbody is racist, we say black and brown body of color now
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Thats not how heating objects with radiation really works, although for the earth in total only about half is directly infrared. Uv has way more energy than infrared - no one is getting warm from x-rays.
Without the source im not 100% but im pretty sure that image is implying that at locations people generally live, most heating is infrared.
Its pedantic anyways, bard is close enough for it to not matter
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Give him a break. Steve used to remember the visible light spectrum by reciting Roy G Biv but since losing his family, having a mental breakdown, and becoming unemployable, it's now Reine G Biv.
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what's wrong about it? it seems right to me
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They're desperate to dunk bardfinn
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BARD BOT ALERT! Reset the counter! Current counter was: 0 days 00 hours 40 minutes and 42 seconds
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Not really wrong, just unnecessarily pedantic transcription of the video.
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Must be wrong people dont just go on the internet to say "wrong" to every comment
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Whatever ELI5 post he copied that from used an outdated source
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She's so knowledgeable about so many topics. I learn something every time I read one of her posts.
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Can someone explain this comment but correct xer
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Wrong
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The other redditor asked how can you heat food in a vacuum tube.
The redditor, as a chronic microwaved mac n' cheese eater, have not heard of vacuum sealer cooking bags.
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Uhm, looks like she is using some outdated textbooks. Thats a simplification that isn't even taught any more and is outright hateful.
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heat transfer is actually a spectrum
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someone already said wrong
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Dont worry, Bardy has logged into his alts to downmarsey
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Bardfinn spamming the report button on that poor dramatards comment history
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BARD BOT ALERT! Reset the counter! Current counter was: 0 days 00 hours 15 minutes and 08 seconds
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BARD BOT ALERT! Reset the counter! Current counter was: 0 days 18 hours 01 minutes and 01 seconds
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I just assume bardy is wrong about everything and it hasn't led me astray so far.
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jeeez Imagine just posting simple "wrong" on every comment she makes
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BARD BOT ALERT! Reset the counter! Current counter was: 0 days 00 hours 29 minutes and 26 seconds
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The person who Bardfinn responded to perfectly described a Dewar. If you haven't seen one of these thingies, it's a big butt metal thermos. It's double-lined, and the air in between has been sucked out to be a vacuum, so that very little heat gets in or out, and the stuff inside stays the right temp. Pretty common to store liquid nitrogen in it.
It's been a while since I've given a shit about physics, but I'm pretty sure solar ovens rely on a curved reflective surface to focus sunlight into a more concentrated area, kinda like using a magnifying glass to fry ants but that's with a lens and not a mirror. Then the light hits something else and it gets fkn hot, ya know like an ant. Then through the power of magic, visible light enters the cooker and infrared stays in because something something.
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Ohhh okay....
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BARD BOT ALERT! Reset the counter! Current counter was: 0 days 00 hours 10 minutes and 01 seconds
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BARD BOT ALERT! Reset the counter! Current counter was: 0 days 00 hours 58 minutes and 26 seconds
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Nice post, bro! I posted it to twitter.
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BARD BOT ALERT! Reset the counter! Current counter was: 0 days 00 hours 01 minutes and 12 seconds
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She is right though
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That's pretty cool, I want one.
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Forget bard, I want that mirror cooker thing
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Snapshots:
undelete.pullpush.io
archive.org
ghostarchive.org
archive.ph (click to archive)
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