Why can't you put metal in a microwave?

Why can't you put metal in a microwave? - Aaron Slepkov

Рет қаралды 932,380

3 ай бұрын

Dig into the science of how microwave ovens use electromagnetic waves to heat your food, and what you should avoid cooking in them.
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In 1945, engineer Percy Spencer was standing near a RADAR device that produced high-intensity microwaves and noticed that his candy bar had melted. He then exposed popcorn kernels to the magnetron device, and sure enough, they popped. Soon after, the first microwave oven became available, using the very same technology. So, how does it work? Aaron Slepkov explores the science of microwave ovens.
Lesson by Aaron Slepkov, directed by Yuriy Polyashko, Darvideo Animation Studio.
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Пікірлер: 508

@hyperviper0126 3 ай бұрын

From a literal military machine to a household device. Just shows inspiration is limitless and beyond who expects ?

@micahbush5397 3 ай бұрын

That's pretty common, actually. War can be a pretty strong incentive for research and development.

@berankb 3 ай бұрын

@@micahbush5397 Very true,things such as computers and modern medicine would be farther away now.This is also true for things like the space race

@casjean8904 3 ай бұрын

@@micahbush5397 velcro!

@danquaylesitsspeltpotatoe8307 3 ай бұрын

This was nearly as informative as the TED Talk why you should not smash your hand with a hammer!

@AloisAgos 3 ай бұрын

Yeah, nearly all innovative tech started out as "how can we use this new technology to kill our enemies?" Before we had nuclear power plants we had nuclear bombs. Before we had GPS, we had spying devices. Before we had a knife for carving, we had a knife for stabbing.

@madcat789 3 ай бұрын

Invisible Gnomes,.cmon, we all know this.

@maddgrampa 3 ай бұрын

Gotta go to work. Work all day.

@hyperviper0126 3 ай бұрын

I agreed. no argument and case closed

@owlson2527 3 ай бұрын

Oh my god it’s cthun

@user-er1ih6xt9x 3 ай бұрын

We're related 💀

@yanguskhan8513 3 ай бұрын

Man tough gig they got. Eleves get to make cookies, gnomes works the waves man.

@luckymo_on 3 ай бұрын

The thing is you CAN put anything in the microwave whether you SHOULD is the question here...

@perpetualbystander4516 3 ай бұрын

You can't boil eggs though, 'cause then you'll end up with a terrible mess.

@perpetualbystander4516 3 ай бұрын

But of course, you could...

@Ya-boy-BoM 3 ай бұрын

Egg go boom

@powpuckmobile9226 3 ай бұрын

Can put a house in a microwave oven. Checkmate

@supportpossum5672 3 ай бұрын

@@powpuckmobile9226 just need a small enough house or big enough microwave oven. You absolutely could.

@6Twisted 3 ай бұрын

3:56 So you're telling me I shouldn't push my face up against the glass to watch it?

@Philippines1943 3 ай бұрын

Yeah, and that's funny because when your mom forced you to get out of your house, she got fined for littering.

@factchannel945 3 ай бұрын

kzfaq.info/get/bejne/e6qepNGfls62j2Q.html

@kronoxodus319 2 ай бұрын

@@Philippines1943 What a useless comment, please find a job.

@alexandermcclure6185 Ай бұрын

@@Philippines1943 Yeah, and that's funny because nobody asked for your opinion.

@hazardeur Ай бұрын

@@alexandermcclure6185strange comment. its youtube comments, he can comment as much as he likes, even if you donßt agree with it

@itsblonk 3 ай бұрын

Ah yes, TED-Ed giving me answers that my intrusive thoughts wanted to know.

@Sara-eh4ln 3 ай бұрын

now I want to know what happens if the metal spoon touches the oven's wall

@cdi_king_harkinian 3 ай бұрын

@@Sara-eh4lnIt explodes

@marianoguy 3 ай бұрын

So now intrusive thoughts is just regular thinking?

@Kaity143 3 ай бұрын

@@marianoguy I think it should be expected because of how misused the word is.

@marianoguy 3 ай бұрын

@@Kaity143 yeah, it's misused to this extreme. If used to describe regular thoughts it loses all meaning

@hotskoz 3 ай бұрын

My first experience with a microwave oven was in the early seventies. I took a job at a restaurant and someone handed me a large can of hot fudge topping and told me to put it in the microwave to heat it up before pouring it into the warmer. They failed to mention I needed to put the fudge in a bowl first so I just opened the can, put it in the microwave and turned it on. Moments later there was a lightning storm firing between the can and the walls. Interesting to watch but probably not too cool for the microwave. A second funny microwave story. My daughter, when she first moved from home, decided to make baked potatoes. She put two potatoes in the microwave and, remembering we always cooked baked potatoes for an hour, set the timer for sixty minutes. She then left to the mall. She came back an hour later to find the fire department had busted down her door and were setting up large fans to clear the dense smoke from her apartment. Lesson learned. Great video.

@alannamichel5627 3 ай бұрын

Omg 😂

@Ath3nx_2 2 ай бұрын

ded rn💀

@nguyenson7073 21 күн бұрын

60 mins is crazy, 6 mins at high power is enough to smoke those 2 potatoes 😅

@zmnicvander 19 күн бұрын

Some 25 years ago my Mom, a coworker of hers, and I went to a convenience store to get instant noodle soup for lunch. Back then the clerks were still managing food preparation, so this one clerk thought that the 3-minute cooking on the soup meant 9-minute cooking if she put the 3 soups together. Of course, the soups boiled out of their cups, the noodles exploded inside the microwave, and it was a mess. The clerk had to clean it up and start from scratch - without charging us double for her mistake. Lesson learned, I hope.

@hotskoz 19 күн бұрын

@@zmnicvander Great story.

@marzukimalik2241 3 ай бұрын

It's almost 3am, I can't sleep, and suddenly this pops up. Thanks!

@QUBIQUBED 3 ай бұрын

wow, science makes you sleepy?

@leolow2057 3 ай бұрын

@@QUBIQUBED wow someone can't read

@Colinnn. 3 ай бұрын

@@leolow2057wow someone’s rude for no reason

@WaveRider1989 3 ай бұрын

Time to heat up some pizza rolls 😂

@thecooleraliguar 3 ай бұрын

they fire waves and they go whooooooosh and then heat. Super simple

@supereldian 3 ай бұрын

The reason microwaves have that mesh screen on the door is to allow users to see inside and to prevent the electromagnetic waves from escaping. The electromagnetic waves are too big to exit through the small mesh screen on the door.

@agnieszkacz_ 3 ай бұрын

Oh damn, that’s actually a really neat piece of addition microwave knowledge 😯😯🤔☺️

@shubhrajit2117 2 ай бұрын

Faraday's cage

@michaelweaver4718 2 ай бұрын

Went to an engineering school where we had to measure the size of the waves. Essentially, the size of a pencil. If you compare that to the mesh screen, even if you remove the metal between two of the holes, the wave still cannot get out. It takes a slightly larger hole, as a bit of redundancy is built in so you do not microwave your face (although your eyeballs will notice them first.)

@1998ichigokurosaki98 3 ай бұрын

It is scary how many people think that that radiation is dangerous. Some even avoid the microwave oven at all

@wocky661 3 ай бұрын

Should we tell them their radiator isn't making them nuclear mutants?

@catdogmousecheese 3 ай бұрын

Well, anything that generates heat is technically radioactive like humans are radioactive because our bodies are constantly generating heat.

@Pingwn 3 ай бұрын

We should all just live in cave in conplete darkness because light itself is radiation and the light we can see has even higher frequency than microwaves.

@justaguy4311 3 ай бұрын

Microwaves make food taste funny

@AliceP. 3 ай бұрын

I feel attacked

@holokyttaja5476 3 ай бұрын

Electroboom tried it in a video and it is arguably harder to get something violent to actually happen than to just get a fork or a knife that is really hot.

@ScotianSouthy 3 ай бұрын

I was looking for the informed comment.

@JasonTheOneAndOnly 3 ай бұрын

I put my face right up the glass when I hungry, am a dead man.

@pedro92073 3 ай бұрын

😂

@suprnova23 3 ай бұрын

You know that little metal matrix/ grating on the microwave door? It prevents any waves from leaving the microwave. They just get bounced back in. I wouldn’t worry about it ✌️

@alexandermcclure6185 Ай бұрын

@@suprnova23 It reduces them exponentially, not perfectly blocking them. This is why there is also a thick layer of glass between the mesh and the outside, too. Still best to sit at least a couple inches away, though.

@HayTatsuko 3 ай бұрын

I love the art style and narration in this. Thanks for making such a lovely presentation!

@pumpkinhead002 3 ай бұрын

You can put metal in a microwave. They even come with metal grates in them sometimes. Eddy current do happen, but it's generally a non issue unless you have something really conductive like aluminum, copper, or gold, and that metal is rough or crinkled. If you put a spoon in the microwave, say like you are stirring your soup and too lazy to remove it. Nothing bad will happen. You won't even get hot spots

@bushputz 3 ай бұрын

I've worked in a lot of commercial kitchens. If we needed something heated quickly and didn't want to fire up a burner, we just threw it in a stainless steel 1/6 pan and nuked it. It's fine unless you leave a metal spoon in it or put a metal lid on it. Lots of people I worked with made that mistake - once.

@terence602 3 ай бұрын

Never put a banana in your microwave while texting your friend

@grapeshott 3 ай бұрын

Time travel is a myth

@margaretwordnerd5210 3 ай бұрын

That is so oddly specific I can't stop visualizing how you learned this. It's the intellectual equivalent of being Rick-rolled. Well played.✌🖖

@redshankyman4181 3 ай бұрын

El Psy Congroo

@terence602 3 ай бұрын

@@grapeshott The organization has brainwashed you.

@terence602 3 ай бұрын

The organization is deleting my replies 💀

@brawlwith_me 3 ай бұрын

I love this animation style.. Good Job👍

@MatubbarAzadAvijit 3 ай бұрын

Many myths surrounding the microwave oven have been discussed in this video. Very good one. Thanks. 👌

@KnowArt 3 ай бұрын

lovely animation

@jaredlee6591 3 ай бұрын

Such a beautiful style

@user-pw3df9jd7x 3 ай бұрын

1. from a military machine to a necessary household device 2. how does a microware oven operate 3. different food's composition will have different effects 4. not all of microwaring metal is dangerous

@factchannel945 3 ай бұрын

kzfaq.info/get/bejne/e6qepNGfls62j2Q.html

@alial-jassim2504 3 ай бұрын

"Microwave is safe" "experts recommend to stay a few feet away when cooking"👁👁

@pedrojorge1912 2 ай бұрын

"to totally limit exposure, experts recommends..." There's no harm being lightly exposed, but if you want to avoid exposure nonetheless, stay a few feet away.

@ronin1648 2 ай бұрын

@@pedrojorge1912 There's a mesh on the screen door that should prevent waves from passing through.

@nimaybolar 3 ай бұрын

Great video. Always wondered this.

@user-wy9go4lx2r 2 ай бұрын

Wait, if spencer's chocolate melted, and popcorn and egg cooked, why wasn't spencer getting affected by the microwave at all?

@noname_noname20 2 ай бұрын

Loved it❤ Amazing explanation

@SharowbladyeGaymerPorate 3 ай бұрын

I absolutely love TED ED Keep going team!

@gailaltschwager7377 3 ай бұрын

Thank you!

@Hollowdude15 3 ай бұрын

Great video TED-Ed :]

@1luvAdriana 3 ай бұрын

Love the animation ❤😊

@raeldri5867 3 ай бұрын

3:57 if it was the intent why put a window that allows me to watch my hot pockets cook? 😅

@masterdna117 3 ай бұрын

perfect video to watch after or before electroBOOM's video on microwaving metal

@user-xx7pq4xj4l 3 ай бұрын

Love the animation

@kidbonesonline 3 ай бұрын

Ted Ed out here asking the REAL questions.

@noahahmed5821 3 ай бұрын

So thrilled to see a Steven Wright joke as the opener!

@freebirdy333 3 ай бұрын

Man i literally was wondering about how do microwaves work a few days ago, thanks 😂🙏🏻

@Smolstarfish 3 ай бұрын

Ted Ed: Why can't you put metal in a microwave? Me: Yeah, why not? 😡

@minanabil-sg1ku 29 күн бұрын

very informational

@paytonturner1421 3 ай бұрын

The video on microwaves is interesting when you dig deeper into the science of it.

@YamenNazer 3 ай бұрын

Wooooooow i loved the animation TED-Ed😍😍😍.. does anybody know what programs used to make such video?>

@maia.papaya 3 ай бұрын

so if u put a dehydrated food in the microwave, it wont even feel warm after?

@paramgalib040 3 ай бұрын

No way Ted Ed posted a video on something I just Googled an hour ago 😮

@ajchapeliere 3 ай бұрын

One of the baking KZfaqrs I follow did a demo on making ganache in a stainless steel bowl in the microwave. They've said it has to be stainless, which makes at least some sense. Stoneware retains a lot of heat, so it's easy to overheat the ganache and break its emulsion.

@briantaylor9285 3 ай бұрын

Amazing.

@Kirnotsarg 3 ай бұрын

4:05 This is what I wanted to know. Thank you!

@danielfrancisco2341 3 ай бұрын

My microwave has a little sticker reminding me to put a metal spoon in if I’m heating liquids to avoid superheating

@caotranvu4799 3 ай бұрын

this one is so good

@maeannengo4908 3 ай бұрын

Please do a video about magnets since some people believe magnets do not work underwater

@migu8328 3 ай бұрын

No! I'm gonna stare at my microwave eyes anninch away from the door

@ghoust592 3 ай бұрын

Thankfully Microwaves now are made with metal grating, radiation is not able to penetrate the grate since the waves are too big for them to escape

@VegaTheLyra Ай бұрын

The amount of things in this world that are only possible because water is polar is insane

@4h4nn 3 ай бұрын

If you reverse the rotation of the rotating plate, you can use the device to build a time machine.

@lzrx 2 ай бұрын

@qowalapundit3171 3 ай бұрын

thanks for great educational vids, btw who was the narrator? Mr. Slepkov himself?

@daitins 3 ай бұрын

Thank you

@RealFoxTrotFox 3 ай бұрын

Thank Ted-ED for answering questions I ask myself at 3am

@user-ww8jf1ib5v 3 ай бұрын

damn interesting. (peak content keep upp ted edd)

@jforster29 2 ай бұрын

There are two dominant heating mechanisms: dipolar rotation and ionic conduction. I have been studying the application of microwaves for assisted comminution of ores and we have demonstrated excellent results! Microwaves can selectively heat sulphide minerals in rocks and this causes differential thermal expansion between the grains and microfractures to occur in the rocks which allows for a reduction in ore competency and an increase in the liberation of valuable minerals.

@Michaelonyoutub 3 ай бұрын

Microwaves heat *liquid* water, they aren't actually that great at heating frozen water, which is why frozen things often don't heat that well and heat unevenly. If something frozen is in a microwave at room temperature, parts on its surface where water might have warmed up enough to thaw due to the air around it, get cooked and then thaw the areas immediately around it allowing them to get cooked, while frozen areas surrounded by more frozen areas, remain frozen and experience no thawing/cooking. Eventually heat from areas that initially thawed and got cooked, reach the frozen areas and thaw them, but by that point the initial thawed area is likely over cooked. That why when cooking something frozen in a microwave, you should first leave it out to thaw a bit so it cooks evenly, or alternatively, find some way to warm it up above freezing with hot water or something before cooking.

@empyreum6869 3 ай бұрын

or you use the defrost setting.

@schoolvilleOfficial 3 ай бұрын

The Animation is nice

@KJchanel88 3 ай бұрын

Wow it is amazing to watch this,,, now we know

@DoneDragon1 3 ай бұрын

Whats crazy is that since there are effectively no moving parts, anyone trying to figure out what it does without knowing about radiation would assume its magic lol

@kiwilonewolf 3 ай бұрын

Great talk, except that radar technology was already in use before Percy Spencer appeared on the scene.

@vaclavnovacek1035 3 ай бұрын

If the magnetron melted Spencers candy bar how come it did not burn him, or at least made him feel the warm?

@jorgemtzb9359 3 ай бұрын

It did, or at least it should have. chocolate bars don't need that much heat to melt but yes, in effect he was being cooked alive... just, barely.

@adrianblake8876 3 ай бұрын

Assuming the candy bar was chocolate (which is how I always heard the tale), it melts at just above room temperature... I've had chocolate melt in my pocket on warm days...

@jeanmarc6517 3 ай бұрын

"I dont understand, how can the sun melt this chocolate bar...but not me??" Because we transfer heat around our body and sweat to expulse heat, unlike the candy bar.

@ajchapeliere 3 ай бұрын

To add a bit to the *first comment: If the waves from the magnetron in the room were primarily being focused upwards to look for aircraft, I think only a small amount would be "leaking" into the room itself, so to speak. Chocolate itself is also... Kinda wild as a material. It has a low melting point and the structures it forms when it solidifies are based on how hot it got while it was liquefied. I'm guessing the difference in composition and size might also be a factor. The human body is mostly water with some proteins for structure and from a scale perspective it's much bigger than the chocolate bar. If you want to dig a bit further into any of it, I recommend finding some videos about "specific heat" (Crash Course or one of the other STEM channels should have something). I'd also recommend videos on tempering chocolate and making ganache. Sorry if I'm coming off as ranty, I get a bit excitable when the random information in my head might have a use *and* lines up in ways I didn't expect 😂 Stay curious, my friend! *Clerical edit: some of the other comments weren't displaying when I initially said "previous"

@ajchapeliere 3 ай бұрын

@@jeanmarc6517that's not very good logic. Firstly, the heat transfer from the sun comes from other parts of the electromagnetic spectrum; some frequencies of microwaves can't even get through our atmosphere because the water vapor and other molecules and particles reflect or scatter them. Secondly, sunburns are basically our skin getting cooked by the sun's UV radiation. This probably has less to do with how our bodies regulate temperature and more to do with where the microwaves were focused and the difference in water content and overall mass between the person and the chocolate bar.

@FreshBeats2 3 ай бұрын

Cool

@atticusspontaneous 3 ай бұрын

Awesome!

@KingOfTheChoppas 3 ай бұрын

4:05 for the part about metal

@user-yj2lo5ch7d 7 сағат бұрын

Just realized, only One minute of the video is actually why we can't put metal in a microrwave

@leediaz5690 3 ай бұрын

Can I ask why it is only affecting foods and not humans when they are using it as a radar for planes?

@zillurzakaria3407 3 ай бұрын

Thanks

@zodiacfml 3 ай бұрын

I just saw a recent microwave video from a few days ago. I'm now certain TED-ed gets their choice of topics browsing youtube. Microwaving tips they gave about metals like spoon or forks very accurate from my experience

@deadlypyre 3 ай бұрын

Hey TedEd, can you please make a video on Music Conductors and its history over the years ?

@abrarjahin8848 3 ай бұрын

I actually am doing a project about microwave and magnetron and yeah i eventually came to this part

@yusufa5429 Ай бұрын

The only downside of leaving your metal spoon inside your bowl of soup in a microwave is the annoying sounds coming from your family when they see it.

@SuparNerd 3 ай бұрын

Imma go microwave a bowl of soup with a spoon in it

@simonmeadows7961 3 ай бұрын

The definition of an intellectual is someone who can watch this video without thinking of Gremlins.

@ryanadams0922 3 ай бұрын

I must be really tired because I read the thumbnail as "how to microwave work"

@michaelhammer5616 3 ай бұрын

So how come the candy bar in his pocket melted, but no temp change to his body? The body comprises of mostly water, no?

@jazz6711 3 ай бұрын

That explains why when I put a little water in my leftovers, it heats up better

@keagan.9334 3 ай бұрын

Ooh so that’s why I created a thunderstorm in my microwave years ago..

@525Lines 3 ай бұрын

My favorite steven wright joke!

@andreivasile4378 2 ай бұрын

Why does it change the taste of food sometimes if it doesnt affect the molecular structure?

@sorakishimoto 3 ай бұрын

Watching this with my freshly heated pizza from my microwave.

@arcie3716 3 ай бұрын

I kept remembering that AWOG episode where one of the characters (I think it was Darwin) left a spoon in the microwave and the house exploded

@Frootyloops629 3 ай бұрын

Its 100% safe but don't stand close to it

@reinefantastique 3 ай бұрын

Hello my dear friend! thank you for the cool video! keep filming! I'll wait for new videos

@Ki1aGam3z 3 ай бұрын

“Soon after, the first microwave oven became available” Ahh yes, a Ted Ed classic line

@SteveFrench_420 3 ай бұрын

Yup... I was just about to say I've left spoons in there before as he said it at the end. Good video

@alec5868 19 күн бұрын

Why when the man was near the radar magnetron the sweet melt but he was unharmed? I mean why the water inside the human body was not vibrating and heating up?

@orena932 3 ай бұрын

Does the microwave interacting "strongly with water" have to do at all with the microwave frequency and water's resonant frequency?

@xBananowyJEx 3 ай бұрын

Ah, the science propaganda. We all know that microwave ovens work on MAGIC~

@cattameme 3 ай бұрын

Ceramic bowls are so mich nicer and feel better quality. I love my ceramic set.

@voldlifilm 3 ай бұрын

This is why I'm usually against the notion of knowing what to use something for before looking for it. We need to do science for the sake of science, because once you shake the universe a bit, there's no telling what might drop out.

@dark_emperor9427 3 ай бұрын

Question: How did Percy not get a burn when the chocolate in his pocket melted due to microwave exposure? I mean the human body also contains a lot of water does it not?

@dexter3play 2 ай бұрын

I have a technical question: Do microwaves make the water molecules rotate or vibrate or both? That information was a bit contradicting in the video.

@tysxlam 3 ай бұрын

So that's why my pizza feels soggy after microwaving it. Huh.

@Kaienhere 3 ай бұрын

Microwave is terrible for reheating dough. An oven or air fryer is the way to go 👍🏻

@degiguess 3 ай бұрын

reheat your pizza in a pan with a very small amount of oil. Let the oil crisp up the bottom of the pizza and then pour in like a tablespoon or 2 of water into the pan and cover it to steam the cheese. Best way to reheat a pizza

@noobiamyes4853 3 ай бұрын

@@degiguessI’d still rather use the microwave

@sarahmcburney 3 ай бұрын

Put a cup of water in the microwave with your pizza to prevent the crust from getting too soggy.

@nightlightknight4177 3 ай бұрын

It's funny how this is suggested while I burnt a sandwich in the microwave😅

@shizenkv 3 ай бұрын

Bro how😭

@revysingh 2 ай бұрын

So basically....I have a greater risk of radiation poisoning from the color purple, than from microwaves.😂

@anneakah 3 ай бұрын

If you heat through oven or microwave and eat it you can easily feel how the oven fluid tastes better

@zeonb 3 ай бұрын

This still doesn't explain why we get a hot plate with cold food after heating it

@tastethejace 3 ай бұрын

Metal impurities in the plate

@margaretwordnerd5210 3 ай бұрын

If a dish or cup is hotter than the food, it isn't microwave safe. Tastethejace is correct about metal impurities. It's not fun to get a 2nd degree burn from a mug handle. Note the unsafe dishes and never microwave them again. Check the bottom for manufacturer labels saying it is or isn't safe, but many don't say. Dishes older than 1980 are frequently not microwave safe.

@perpetualbystander4516 3 ай бұрын

Plates are known for being greedy heat absorbers...

@margaretwordnerd5210 3 ай бұрын

@@perpetualbystander4516 It isn't about the shape of the dish. Try microwaving a plate made of paper, plastic, or ceramic without metal. Does the plate get hotter than the food? Now microwave a different shape that is lead glazed pottery. That can get dangerously hot. Watch the video, they explain it well.✌🖖

@perpetualbystander4516 3 ай бұрын

@@margaretwordnerd5210 Oh, it seems I forgot to add a suitable smiley to go with my previous comment. Here it is: 😜 But thanks anyway for the info I never asked for. 👍