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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsPhotoelectric effectEasy2 minPYQ_2020

PhysicsEasysingle choice

The light of wavelength $λ^{'}$ incident on the surface of metal having work function $ϕ$ emits the electrons. The maximum velocity of electrons emitted is $(c =$ velocity of light, h=Planck's constant, m=mass of electron $)$

Options:

Answer:

Solution:

(C) $hv - ϕ = E_{m a x} = \frac{1}{2} mv^{2}$ $\frac{hc}{λ} - ϕ = \frac{1}{2} mv^{2}$ $v^{2} = 2 \frac{( hc - λ ϕ )}{λ m}$

Stream:MHT_CETSubject:PhysicsTopic:Modern PhysicsSubtopic:Photoelectric effect

⏱ 2mℹ️ Source: PYQ_2020

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