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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsPhotoelectric effectMedium2 minPYQ_2019

PhysicsMediumsingle choice

When photons of energy $h v$ fall on metal plate of work function ‘ $W_{0}$ ’, photoelectrons of maximum kinetic energy, ‘ $K$ ’ are ejected. If the frequency of the radiation is doubled, the maximum kinetic energy of the ejected photoelectrons will be

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Answer:

Solution:

$∵ K = h v - w_{o}$ ….(1)
Now
$K^{'} = h (2 v) - w_{o}$ …(2)
$(2) - (1)$
$K' - K = h v$
$\Rightarrow K^{'} = K + h v$

Stream:MHT_CETSubject:PhysicsTopic:Modern PhysicsSubtopic:Photoelectric effect

⏱ 2mℹ️ Source: PYQ_2019

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