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Forks in microwave ovens are known to spark.
Forks in microwave ovens are known to spark. However, as far as I've heard, laser in the infrared and visible light spectrum don't build much or any charge on metal. I was curious about which electromagnetic wave builds charge the fastest/most efficiently. I expect one of the ionizing types of radiation?PS: I assume that this only happens with metal, but for all I know some EMW might build a charge in other things.Thank you for your help.