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NEET 2006 (AIPMT) · Photoelectric Effect: Einstein's Equation

Photoelectric Effect: Einstein's Equation question from NEET 2006 (AIPMT)

Q162NEET 2006 · AIPMTEasy

Photoelectric Effect: Einstein's Equation

When photons of energy h $\nu$ fall on an aluminimum plate (of work function E0), photoelectrons of maximum kinetic energy K are ejected. If the frequency of radiation is doubled, the maximum kinetic energy of the ejected photoelectrons will be

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Answer: (a)

$K = h\nu - E_0$ .
New: $K' = 2h\nu - E_0 = h\nu + (h\nu - E_0) = K + h\nu$
So the answer is (a) $K + h\nu$ .

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