Question

What is photoelectric effect?​

Answer 1

Answer:

Photoelectric effect is the phenomenon of ejection of electrons from a material upon exposure of electromagnetic radiation of frequency greater than the threshold frequency of the metal. 

Answer 2

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Photoelectric effect, phenomenon in which electrically charged particles are released from or within a material when it absorbs electromagnetic radiation. The effect is often defined as the ejection of electrons from a metal plate when light falls on it.