Speed of Light, Microwave Oven and How It Works

Hi I was gonna make a different video but then I thought to myself Microwaves You need to know how Microwaves work *Hit the camera* Ouch S**t See a Microwave outputs very high power high frequency Electromagnetic waves inside the oven cavity Injected right from here This channel is a waveguide which is responsible to guide the waves inside the oven cavity. And hence the name Wave Guide Basically guides the... waves... Most things like food have polar molecules which is kind of like this magnet. Except that the polar molecule have electric polarity like water molecules. Now if I bring another magnet close by... S**t.*Beep* You see that the changing field makes my polar molecule move. *dududududu* See, the water is boiling Now , the Electromagnetic waves also keep oscillating in a microwave. So, if there're polar molecules like water existing in the chamber.. Those waves make the Molecules switch direction very fast. The friction between the Molecules increase the Thermal Energy and food heats up. So, the first question that naturally comes to mind is that.. If I leave an LED in the Microwave, would it turn on? I mean there is a lot energy in there so it's bound to turn on. I'm going to put a white LED in the Microwave and see if it turns on under the energy of the Microwave. There..*PEEP* *duuuuuuuu* *le sparks appear* Oh S**t *BEEP* *camera moving violently* Ohh.. noouu.. :( My LED is burning huh..hu I suppose that not how an LED should turn on. And that's why you should've even put the smallest piece of metal in microwave Well I was hoping to pour a bucket LED's in the Microwave and see how the areas with the higher energy are lit brighter. See, the waves coming out of the Wave Guide continuously reflect from the metal walls creating standing waves. This means there're energy peaks and valleys in the 3D space in the chamber. There should be another way to see them.. I have a Cardboard box I'll place in here and heat it up for 20 to 30 seconds and then look at it with my Thermal Camera.. to see how it looks like. *PEEP* *PEEP* There.. *PEEP* *Duuuuuuuuuuuu* *Violent Sparks Appear* Oh S**t *Camera moving violently* *PEEP* *Blowing Sound* *BEEP* F**king staples Make sure there is no metal in whatever you put in the microwave Let's try again.. *PEEP* *PEPEEP* Wow! look at this This heat pattern gives you a very good idea of the electromagnetic waves inside the chamber. Now if I just measure the peaks between two closest hotspots.. It would be half the wave length of the waves in the chamber. Which is around... 6.3 centimeters. So a full wave length is 12.6 centimeters. Knowing the microwave frequency is 2.45 Gigahertz by design.. We can calculate the speed of light in which the waves travel at.. to be around.. 308 million meters per second. Which is pretty close to the actual speed of light around 300 million meters per second. Mann.. The Seek Thermal Camera is pretty useful. In fact I'll giveaway two of these! to my Patreon at the end of the video. Looking at the wave patterns you can understand why the oven has a rotating plate. This make sure the food is heated more evenly. Let's try again with rotation.. *PEEP* *PEEEP* There.. Well still some large areas are not heated as well as the others. So you better mix the food halfway and re-heat. Now not everybody has a Thermal Camera "HA HA" But I figured a different way. You know these pens that have erasers? The way the eraser works is by heating up the ink and the ink goes invisible. I take a piece of paper and completely cover it in this ink. This is gonna take forever.. Let's just cut the container.. *WW1 machine gun fires* *splat* Well it wasn't enough to cover the whole page.. but let's give it a try. Now we'll just leave it in there in some mid-height of the microwave and let it heat up for 20 seconds.. *PEEP* *clap* *duuuuuuuuuu* There, you see that the ink has been hot in three spots.. And the distance between the closest hotspots is somewhere around.. 6.2 - 6.3 centimeters which is consistent with the halfway length of the Microwave. I've got a broken Microwave from my friend which I like to further open up and see how it works.. Let's see what's broken in there. *PEEP* *unhealthy, concerning, probably going to blow up duuuuuuuu* Now this sound's terrible. *PEEP* Whatever.. let's open it up. I have it open. The system is pretty a straight forward. You can see that the AC lines entered from that corner and feeds it *BEEPS* *BEEPS* *BEEPS* *Smacks head under the table* Always make sure the circuit is disconnected from power supply before you start tinkering with it. Same you have to make sure your patient is under anesthesia before you cut them open. Anyway, all those Microwave powers are generated from this. Which is called a Megatron. *♫DROP♫* *♫TRANSFORMERS!♫* *♫DUN DUN DUN♫* Oh no sorry.. Urr.. This is a Transformer. This is called a Magnetron. It's a device build upon the dark arts of electronics. It is basically a high power oscillator resonating.. at 2.45 Gigahertz when you apply a very high voltage to it. And it outputs those waves through the Wave Guide into the chamber. Which is placed on the top in this one. If you like to know more about the Megatron *♫TRANSFORMERS!♫* Dammit! I mean the Magnetron I suggest you watch the video of EngineerGuy from link in my description. The high voltage to the M.. MAGNETRON.. comes from this huuge.. *♫TRANSFORMERS!♫* *♫DUN DUN DUN♫* :v THIS BABY TAKES THE 120 VOLT AC AND INCREASES IT UPWARDS OF 2000 VOLTS! AND FEEDS IT TO THE MAGNETRON WHICH RESONATE AND OUTPUTS HIGH POWER WAVES AND THOSE WAVES SHAKES THE POLAR MOLECULES GENERATING MUCH HEAT! And this is a fan... In any case there're a lot of things I can scavenge from this oven. This huge Transformer.. The Magnetron.. The Motor.. Welp that's pretty much it.. the rest goes into the Junkyard. But first let's unplug this Transformer and power the oven and see what happens.. Apparently the output of the Transformer is between the secondary and the body of the microwave. I just put a wire in here.. to kickstart the arc. *PEEP* *Loud 2000V Arc* HOLY S**T*BEEP* Well that was dangerous.. See.. the output voltage of the Transformer is not high enough to jump across this gap. That's why I put a thin wire to close the gap a lot and create the channel for the arc. As soon as you have that channel it can extend over a larger gap if there is enough power available. And that voltage can fry you in a microsecond. So don't try this at home. While researching the Microwave in the web, I realized there is this extra component in their drawings.. called the "Stirrer" It's pretty much a fan with metal blades rotating right in front of the Wave Guide and it's like a bunch of moving mirrors that reflects the waves in all these different directions. It tries to make sure that there are no fixed standing waves or hot and cold spots in the chamber unlike what you saw from my thermal imaging. It's keep moving those hotspots around.. resulting in a more uniform heating of the food. Well, obviously as you saw from my thermal image, my oven doesn't have it. Or this one. I'm pretty sure I've never seen that before although it sounds like a good idea. It would be good to know if your oven have it. So, when you have it on look directly into the Wave Guide and see if there is any metal blades.. *SARCASM* I'm obviously joking about looking directly into the Wave Guide. Don't do it or you will have mashed potato for brain. I'm nervous now.. What if somebody pause the video before I said it was a joke.. To go look inside the Wave Guide while it's running. On a bright side, it could help make the future generations smarter by natural selection. This Transformer is pretty much the entire weight of the oven. And it's my new pride and joy. And I don't quite know what I can do with the Magnetron besides causing cancer.. Aannd I have a strange-looking AC Motor *♫DUN DUN♫* *♫GIVEAWAY TIME♫* Do you like to know who's the hottest among your friends? Well the Seek Thermal Camera can't help you with that. But considering I'm reaching 1 Million Subscriber it must be me! The Seek Thermal Camera is an awesome tools for troubleshooting and research. So I'll pass two of them to my beloved patreons at patreon.com Also I'll leave a link to the products in my video description. Patreons man.. There're making my channel happen So, Hili Mamnoon Which in English means "Much Thank" But man, I'm reaching 1 Million Subscribers anytime now. Huh? What The? *1 hour later* *Clap* There! Back on the path of glory! Anytime Now! *RIP* Please Subscribe to my channel and do the Bell to receive notifications.. What else?.. Drop a Like? And I still need to figure out what to do to celebrate the 1 Million Subs So.. Leave a suggestion below while you're at it. Thanks! *Sick Beatbox*

Channel: ElectroBOOM

Views: 3,770,724

Keywords: educational, electrical, electroboom, electronics, engineering, entertainment, equipment, mehdi, mehdi sadaghdar, mishap, physics, sadaghdar, science, test, tools, circuit, funny, learn, shock, spark, protection, short circuit, magnet, microwave, oven, waveguide, stirrer, transformer, megatron, magnetron, fan, reflect, heat, high voltage, oscillation, speed of light, measure wavelength, frequency

Id: nqTDCkuVADw

Length: 10min 1sec (601 seconds)

Published: Fri May 12 2017