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

Question

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

MARKS App · Accepted Answer

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

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