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PhysicsModern PhysicsPhotoelectric effectEasy2 minPYQ_2020

PhysicsEasysingle choice

The photoelectric threshold frequency of a metal is v. When light of frequency 4v is incident on the metal. The maximum kinetic energy of the emitted photoelectrons is

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Answer:

Solution:

From Einstein's photoelectric equation the maximum kinetic energy of photoelectrons emitted from metal surface is given by

$E_{k} = h v_{1} - W$

Where W is work function of metal.

Given, $W = h v$ and $v_{1} = 4 v$

$∴ E_{k} = 4 h v - h v = 3 h v$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Modern PhysicsSubtopic:Photoelectric effect

⏱ 2mℹ️ Source: PYQ_2020

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