Found as a link within one of the APOD posts:
http://www.physics.umd.edu/icpe/newsletters/n34/marshmal.htm

dave boling

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I teleported home one night
With Ron and Sid and Meg.
Ron stole Meggie's heart away
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'Bundinn er bátlaus maðu'.

Beautifully simple..

Very clever method. However, it may work only with microwaves from which you've removed a turntable. Those without a turntable to begin with will have some other mechanism inside to distribute the radiation uniformly. (Makes me think of Leslie speakers.)

It amazes me how people figure this stuff out.

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"Time is the wisest counselor of all." - Pericles

"I remain not entirely convinced of it." - Nano

Elegant use of the standing wave in a tuned chamber.

Bob

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Not everything you can count, counts. And not everything that counts, can be counted

The Expert's Mind has few possibilities.
The Beginner's mind has endless possibilities.
Shunryu Suzuki, Roshi

My experience is that microwaves tend to have one or two hot spots. I base this on the dessicants that turn color when they dry out, so much less sensitive than the melting of marshmallows. I'll have to try this. I have no doubt that it works, since this was submitted to American Journal of Physics (an educational journal).

One question jumps out at me -- this requires a standing wave; anyone know why there would be a standing wave in the oven?

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Charlie
Whorfin Woods
Don't blame me, I voted for Cthulhu