The photoelectric threshold frequency of a metal is v. When light of frequency 4v is incident on the metal. The maximum kinetic energy of the emitted photoelectrons is

Question

The photoelectric threshold frequency of a metal is v. When light of frequency 4v is incident on the metal. The maximum kinetic energy of the emitted photoelectrons is, 4 hv, 3 hv, 5 hv, 5 2 hv

MARKS App · Accepted Answer

From Einstein's photoelectric equation the maximum kinetic energy of photoelectrons emitted from metal surface is given by E k = h v 1 - W Where W is work function of metal. Given, W = h v and v 1 = 4 v ∴ E k = 4 h v - h v = 3 h v

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