Eli5 : Why are sparks created when microwaving metal?
In: 5
Metal, like a spoon, doesn’t always create sparks in a microwave though. And sometimes it can actually be safer to put a spoon in a glass of water when you heat it. Because the spoon can reduce the risk of the water getting superheated (above boiling temperature without actually boiling).
https://physics.stackexchange.com/questions/234042/should-i-place-a-spoon-in-a-cup-of-liquid-before-heating-it-in-a-mircowave
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