how a microwave works

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Picture of davor138720 achievements

+55 1. davor1387 commented 8 years ago

Wow, where did you dig this video up from. looks like 3D didn't even exist yet.
Picture of Siruss21 achievements

+5 2. Siruss commented 8 years ago

Hmmm, question... is this why just putting butter in a bowl to melt it not good idea as there is virtually no water content? In other words, if the microwave energy is not being effectively absorbed by the food, can it travel backwards up to the magnetron and burn it out due to feedback? Where does the excess energy go if not into the food? :O
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0 3. orion commented 8 years ago

#2 The most obvious way to do this is just to run it when empty. The equilibrium between absorbing/escaping and creation of microwaves is shifted, so you get higher field intensity which can overheat and eventually destroy the microwave source. Similar to wrapping a lightbulb in an alu foil.
Picture of knight40 achievements

+25 4. knight commented 8 years ago

I misread it as Megatron
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+4 5. Granko commented 8 years ago

@Siruss, don't bother with butter, MW works also with toilet paper or lightbulbs :)). However, letting MW work without the load will probably lead to somethink breaking... Well, it's a $50 experiment so go for it.
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0 6. Thanny commented 8 years ago

#2 There's still plenty of water in butter. Most modern microwaves even have presets to soften or melt sticks of butter.

However, water isn't necessary. While water molecules are particularly good at absorbing energy from microwaves at 2.4GHz, they aren't the only molecules that do so. Oil (such as clarified butter, where all the water has been boiled away) will heat up in a microwave all by itself, but more slowly.

Other things will heat up as well, including dishes that are not microwave safe (that's what makes them unsafe - they absorb the microwaves and heat up by themselves, unlike safe dishes which get hot only by virtue of contact with the heated food).
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+2 7. Urmensch commented 8 years ago

#2 Butter is about 20% water, but it's better to just use the defrost setting to soften it.
Though I normally put in a bowl with an inch of water and put the butter on a plate above the bowl. That way the water is heating the plate from beneath as well.
Picture of Sebastien45 achievements

+3 8. Sebastien commented 8 years ago

#5 Great advice... and please film it and report back!
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+3 9. Tehrasha commented 8 years ago

#2, Early microwave ovens were very sensitive to reflected power and would burn-out the magnetron. The easiest way to do that was operate the oven while it was empty. However most modern microwave ovens, even the cheap ones, have no problem with reflected power and can handle operating empty without damage for long periods of time. (usually the amount of time that you realized you forgot to put the food in) :)
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+3 10. vanova commented 8 years ago

i tired it with my memory stick and it surely deleted all DATA! ... forever!
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. need new memory stick! :|
Picture of c0mmanderKeen36 achievements

-2 11. c0mmanderKeen commented 8 years ago

moar entropy :)
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-5 12. MurderVictim commented 8 years ago

Crap and boring.
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-2 13. ZaMpTi commented 8 years ago

#4 yupp same here
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0 14. rufinus commented 8 years ago

what you can heat food with it ?

i thought this is just the machine to destroy cd/dvd safely forever.