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MHT CET 2026 (14 May, Shift 2) · Photoelectric Effect: Einstein's Equation

Photoelectric Effect: Einstein's Equation question from MHT CET 2026 (14 May, Shift 2)

Q8MHT CET 2026 · 14 MAY · SHIFT 2Easy

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 radiation is doubled, the maximum kinetic energy of ejected photoelectrons will be

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Answer: (b)

$K = h\nu - W_0$ , so $h\nu = K + W_0$ .
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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