Light of a certain energy shines on a metal and causes electrons to be emitted.

Based on the research of Albert Einstein, what change would most likely result in stopping the emission of electrons from this metal?

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Hagrid

Light of certain energy shines on a metal and causes electrons to be emitted. Based on the research of Albert Einstein, the change that would most likely result in stopping the emission of electrons from this metal is to coat the metal.

your answer is: the use of that light has a lower frequency