Did you ever gets panic when you left your metal spoon or fork in the microwave because you know that microwave and metal do not goes well together? The question is why can’t you put metal in microwave?

According to Leda Zimmerman, microwaves are a form of electromagnetic radiation, like radio waves and they pulse back and forth rapidly inside an oven at a carefully calibrated frequency. Microwaves bounce off the oven’s interior metal walls, pass through paper, glass, and plastic, but they get absorbed by food — more specifically, by the food’s water content.

All these waves will be deflected if a metal is placed inside just like a mirror. When it is deflected, the waves jumps inside the microwave erratically causing sparks and possibly leads to a fiery explosion.