Why metal vessels are not kept inside microwave oven?
I don’t keep metal vessels in my microwave oven, because I frequently need to use the oven for cooking things. Why is it reccomended not to cook in metal vessels? In order to really understand the answer to that question, you need to understand how an antenna works. Any metal object that you put in the oven will become an antenna, converting microwave energy to oscillating electric currents within the metal object, and converting the energy of oscillating electric currents back into microwaves. The strength of the current in the metal object depends in very complex ways on the precise shape of the object. One object might absorb very little energy from the oven, while another might get dangerously hot, and yet another (especially, foils or objects with sharp points or edges) might be a source of bright “electric arcs” between the metal object and the walls of the cavity. If the metal gets hot or if it arcs, that might overload the oven’s circuitry, possibly damaging it (somewhat like a
