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Old 08-27-2007, 03:54 AM #17
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Default Re: Popcorn popping...

$1000000 --
You got it -- The microwaves excite the water mollicules in whatever it hits. Liquid water, wet rag or residule moisture inside the popcorn hull. A drop of water, a pinch of energy, steam and POP. Hot oil cooks evenly from the outside in causing the same event.

Interesting aside info: The first microwave ovens (Radarange) ran at 2.5 Ghz. The new ones run at 5 GHz. 2.5 GHz is the range for satelite uplinking !!! There's pirates on them there birds talking for free !!! Like the old CB days

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Old 08-27-2007, 03:57 AM #18
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Default Re: Popcorn popping...

Hey Mike, take your Co2 laser and shoot the popcorn kernel.. ;D It would probably explode with delight.
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Old 08-27-2007, 04:19 AM #19
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Default Re: Popcorn popping...

Gazoo --

Even without focus, the Co2 would burn one side, the outside and pooy, burned popcorn

HEY -- I'm a level 5 !!! A major event in my life passes without notice --- even by me !!!

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Old 08-27-2007, 12:58 PM #20
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Default Re: Popcorn popping...

Quote:
Originally Posted by millionaire
so the waves get the water vibrating fast enough to heat it up. thats why the plate normally doesnt get hot. I think this is right but not 100% sure. someone correct if i am wrong.
Microwave ovens are interesting devices, and the processes by which they heat food are quite complex.

The process has nothing to do with any resonance of water molecules, such effects occur on much higher frequencies than actually used. The main 2 processes of heating are due to the dipole moment of the water molecule, which causes it to move in sync with the RF field regardless of frequency. The other major process is dielectric loss, which also applies to nonpolar substances (such as fats) in variable degree. This is why its perfectly possible to heat water-free fats or oils in a microwave.

As for the frequency: larger industrial-size microwaves use 900 MHz, which requires a larger chamber, but has the advantage of penetrating deeper into the foodstuff heated.

Quote:
YES --- We have popcorn FUSION energy *!! *
SenKat -- *12 beams on a kernal from all sides *--- *This would make a great video
I bet this would be a very cool experiment! Perhaps if you're left with a dozen or so diodes from the group buy, you could try. If it doesnt work, just sell it as an artpiece to some museum - i'm sure it'd make a profit

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Even without focus, the Co2 would burn one side, the outside and pooy, burned popcorn
Throw a kernel in the cavity and power it upready ;p
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Old 08-28-2007, 03:37 AM #21
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Default Re: Popcorn popping...

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Quote:
Even without focus, the Co2 would burn one side, the outside and pooy, burned popcorn *
Throw a kernel in the cavity and power it upready ;p
Again... That will still only cook half of the side. And now for a weird idea.
If you can just get the popcorn kernal to "float" somehow (A Popcorn Magnet >_&gt and Get mirrors to cook the kernal from all sides, MAYBE you could get a result, but not guarentee on that. And again... Simply heating up the water INSIDE of the kernal will heat it into steam.
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Old 08-28-2007, 03:53 AM #22
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Default Re: Popcorn popping...

how about getting a laser not powerful enough to burn, but powerful enough to create a bit of heat to turn the water to steam? interesting idea! but getting popcorn to float in mid air will be more rewarding that popping it with a laser!
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Old 08-28-2007, 04:00 AM #23
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Default Re: Popcorn popping...

DD776 --

That's what I was trying to imply -- Levetation of the kernal as in fusion !! Maybe with sufficient ultrasonic energy, the kernal could float and be blasted from all sides !!! POPCORN FUSION

Mike

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Old 08-28-2007, 12:40 PM #24
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Default Re: Popcorn popping...

I'm still convinced that if you put popcorn kernels in the cavity of a CO2 laser of sufficient power, something WILL definitely pop.

I dont dare to guarantee it will be the popcorn though
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Old 08-29-2007, 08:58 AM #25
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Default Re: Popcorn popping...

Water absorbs at 1400nm so if you had that wavelength it might make it easier to heat it up without damage. The problem that making a laser at that wavelength is pretty useless for any practical purpous due to the absorbtion of water which can be found in pretty much everything.

In general, IR is going to work better than visible as the IR can excite molecular bonds and transfer heat easier. But again, there is less use for lasers at such long wavelengths and so they are harder to come by.

I'de try multiple unfocused lasers uniformly heating the kernal.
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Old 08-29-2007, 09:01 AM #26
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Default Re: Popcorn popping...

all that just to heat one kernal ;D ;D ;D ;D
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Old 08-29-2007, 05:53 PM #27
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Default Re: Popcorn popping...

Well I guess it's easier to just use the microwave.. ;D
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Old 08-29-2007, 09:11 PM #28
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Default Re: Popcorn popping...

you got that right!!! ;D ;D ;Deven a TEC might pop popcorn!!
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Old 08-29-2007, 11:59 PM #29
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Default Re: Popcorn popping...

I hadn't done it before, but I'm sure that heating it a long time with no sharpie mark will heat it evenly and maybe pop.
if the moisture isn't just right inside, it won't pop.
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Old 08-30-2007, 01:21 AM #30
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Default Re: Popcorn popping...

Remember that it's the shell which has to absorb the heat.
Pick a big wet kernal ;D

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