Q 1215091860.     A photon of frequency `f` causes the emission of a photoelectron of maximum kinetic energy `E_k`, when it strikes a metal surface. If a photon of frequency `3f` is incident on the same metal, the maximum kinetic energy of the emitted photoelectron

A

equals `3E_k`

B

may be equal to, less than or, greater than `3E_k`

C

is less than `3E_k`

D

is greater than `3E_k`

HINT

Einstein’s equation for the photoelectric effect.

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