Skip to content
doubtly
Chapter: Dual Nature of Radiation and Matter· Physics

If the frequency of incident light falling on a photosensitive material is doubled, then kinetic energy of the emitted photoelectron will be _____.

Q.1 (vi) If the frequency of incident light falling on a photosensitive material is doubled, then kinetic energy of the emitted photoelectron will be _____.

A. the same as its initial value

B. two times its initial value

C. more than two times its initial value

D. less than two times its initial value

1 answer

Best answer

Answer: C. more than two times its initial value

Answer: (c) more than two times its initial value

By Einstein's equation, \(K_1 = h\nu - \phi_0\). With frequency \(2\nu\): \(K_2 = 2h\nu - \phi_0 = 2(h\nu - \phi_0) + \phi_0 = 2K_1 + \phi_0\). Since \(\phi_0 \gt 0\), \(K_2 \gt 2K_1\).

Doubtly AI · 29 Oct 2026 AI-generated · not yet verified Report
Was this answer helpful?

Your answer

Log in or create a free account to answer this question.