''electromagnetic radiation'' Heh. Nope, its just waves that turn inside out or something and create friction which then creates heat, then those waves are being guided through a waveguider. Those rays are close to flat, so they dont make any radiation. Even dosimeters dont go off near microwaves. now if waves are really high theres the ionising radiation.
no. I don't think that's how it works. it is because of an electromagnetic radiation hits the metal and bounce off illegally.