its actually not.
You need something the size of at least half the wavelength of the microwave, or multiples of it. Thats why forks and aluminium foil spark a lot (they have “antennas” that allow for charge separation through the microwave and if two of those separated charges are in close proximity a spark is formed).
But if you have one single “antenna” like in a knife or spoon, no part of large charge separation is close enough for a spark.
However if you dont know about this you better not put anything metallic or conductive into the microwave.
its actually not. You need something the size of at least half the wavelength of the microwave, or multiples of it. Thats why forks and aluminium foil spark a lot (they have “antennas” that allow for charge separation through the microwave and if two of those separated charges are in close proximity a spark is formed).
But if you have one single “antenna” like in a knife or spoon, no part of large charge separation is close enough for a spark.
However if you dont know about this you better not put anything metallic or conductive into the microwave.
We had a microwave in highschool we used to throw shit into to see what happened. CDs were good.
Incandescent light bulbs are the best