Assertion : Photoelectric effect supports the quantum nature of light.\ Reason : Photoelectric emis

Question

Assertion : Photoelectric effect supports the quantum nature of light.\ Reason : Photoelectric emission is instantaneous.

Professor PC Thomas Classes · Answer

(b) : Photoelectric effect is observed only when the frequency of the incident radiation is more than a characteristic value depending upon the metal. Small amount of energy given slowly over a long time does not liberate photoelectrons. Thus, photoelectric emission is an instantaneous process.