Photoelectric emission takes place from a certain metal at threshold frequency ' v '. If the radiation of frequency ' 2 v ' is incident on the metal plate, the maximum velocity of

Question

Photoelectric emission takes place from a certain metal at threshold frequency ' v '. If the radiation of frequency ' 2 v ' is incident on the metal plate, the maximum velocity of the emitted photoelectron will be ( m = mass of electron, h = Planck's constant)

TestHub · Accepted Answer

Einstein's photo electric equation Concept: The maximum kinetic energy of photoelectron is written: 2 1 ​ mv m 2 ​ ≤ hv − θ The threshold frequency is given by hv c ​ = θ Given, v c ​ = v , now for radiation with frequency 2 v ​ 2 1 ​ mv m 2 ​ ≤ h ( 2 v − h ( v )) ⇒ v m ​ m 2 hv ​ ​ ​ Option (A) is correct.

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