Microwaves and aluminum foil...

TrueBlueLS

Platinum Member
Jul 13, 2001
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I've always wondered why these two items don't mix. I don't have a spare one to test it out with, so does anyone want to explain this to me and what makes it do it over other metals?
 

Eli

Super Moderator | Elite Member
Oct 9, 1999
50,419
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Originally posted by: TrueBlueLS
Originally posted by: TheEvil1
any metal and microwaves is bad

I've always thought it was just aluminum foil.
Nope, it's the metal.

A microwave oven sends waves at whatever we put in. The waves are set such
that water molecules absorb them very well, changing the radiation energy
into heat energy. Metal will absorb microwaves, but it will not change the
radiation energy into heat energy. The metal re-emits the radiation energy:
very much like visible light reflecting from the metal coating of a mirror.
More and more radiation energy is added to the oven, but none gets absorbed.
Eventually the amount of radiation energy is great enough to cause sparks to
fly, possibly causing a fire.


 

PrincessGuard

Golden Member
Feb 5, 2001
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Any thin metal (or metal with sharp edges) in the microwave can potentially spark. You can probably stick a spoon in there without issue.
 

JC

Diamond Member
Feb 1, 2000
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Most modern microhoods have a metal rack or two. It's insulated from touching the sides, it hangs on plastic hooks. I've heard that it's the 'sharp edges' that cause problems, or metal touching the inside of the microwave.



JC
 

toant103

Lifer
Jul 21, 2001
10,514
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Originally posted by: TrueBlueLS
I've always wondered why these two items don't mix. I don't have a spare one to test it out with, so does anyone want to explain this to me and what makes it do it over other metals?

sparks
 

WinkOsmosis

Banned
Sep 18, 2002
13,990
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Originally posted by: hypersonic5
I think I'm going to do the grape thing as a science fair project next year.

How is that a science project? It's been like 5 years since I've done a science project, but don't you need a hypothesis, inferences, and all that crap?
 

Marshallj

Platinum Member
Mar 26, 2003
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Originally posted by: WinkOsmosis
Originally posted by: hypersonic5
I think I'm going to do the grape thing as a science fair project next year.

How is that a science project? It's been like 5 years since I've done a science project, but don't you need a hypothesis, inferences, and all that crap?


Nah, sparks is where it's at.