Why does aluminum foil spark when you put it in a microwave, although it's just heat and not electric?
A microwave is a high energy radio wave, not an infrared heat waveIt heats food by exciting water molecules in the foodSimilarly, when it strikes a conductor like aluminum, electrons in the conductor are excitedThe electrons leap from the aluminum in the form of photons or sparks - what you see as lightI wouldn't recommend putting aluminum in a microwave or playing around with microwaves in generalThey can burn you in unexpected and painful ways.
