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MHT CET 2019 (2 May, Shift 1) · Photoelectric Effect: Einstein's Equation

Photoelectric Effect: Einstein's Equation question from MHT CET 2019 (2 May, Shift 1)

Q130MHT CET 2019 · 2 MAY · SHIFT 1Easy

Photoelectric Effect: Einstein's Equation

When photons of energy $h\nu$ fall on a metal plate of work function ' $W_0$ ', photoelectrons of maximum kinetic energy ' $K$ ' are ejected. If the frequency of the radiation is doubled, the maximum kinetic energy of the ejected photoelectrons will be

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Answer: (b)

$K = h\nu - W_0$ .
New: $K' = 2h\nu - W_0 = h\nu + (h\nu - W_0) = K + h\nu$
So the answer is (b) $K + h\nu$ .

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