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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsPhotoelectric effectEasy2 minPYQ_2022

PhysicsEasysingle choice

The threshold frequency of a photoelectric metal is $v_{0}$ . If light of frequency $4 v_{0}$ is incident on this metal, then the maximum kinetic energy of emitted electrons will be:NEET 2022 (Phase 2)

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Solution:

By using Einstein's photoelectric equation, we have, $KE = h v - ϕ KE = h v - h v_{0} = h (4 v_{0}) - h v_{0} = 3 h v_{0} where, h = Planck’s constant, v & v_{0} = frequencies, and ϕ = work function.$

Stream:NEETSubject:PhysicsTopic:Modern PhysicsSubtopic:Photoelectric effect

⏱ 2mℹ️ Source: PYQ_2022

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