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Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsPhotoelectric effectMedium2 minQB

PhysicsMediumsingle choice

Let $K_{1}$ be the maximum kinetic energy of photoelectrons emitted by a light of wavelength $λ_{1}$ and $K_{2}$ corresponding to $λ_{2}$ . If $λ_{1} = 2 λ_{2}$ , then :

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Answer:

Solution:

$K_{1} = \frac{h c}{λ _{1}} - ϕ K_{2} = \frac{2 h c}{λ _{1}} - ϕ = 2 K_{1} + ϕ$

For positive work function, $K_{1} < \frac{K _{2}}{2}$

Stream:JEESubject:PhysicsTopic:Modern PhysicsSubtopic:Photoelectric effect

⏱ 2mℹ️ Source: QB

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