Explaining Electric Spark in Microwave with Foil-Wrapped Hamburger

Thread starter GunUltimateID
Start date Dec 26, 2011
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Electric Microwave Spark

Dec 26, 2011

GunUltimateID

I put a hamburger(wrapped by foil) into microwave and pressed start. I noticed an electric spark near the foil's surface. How can we explain this incident?
ps. sorry for my english

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Dec 26, 2011

torquil

http://en.wikipedia.org/wiki/Microwave_oven#Metal_objects

Dec 26, 2011

GunUltimateID

thank you very much

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