Physics - Modern Physics Question with Solution | TestHub

PhysicsModern PhysicsPhotoelectric effectEasy2 minPYQ_2016

PhysicsEasystatement

A photoelectric surface is illuminated successively by monochromatic light of wavelengths $λ a n d \frac{λ}{2} .$ If the maximum kinetic energy of the emitted photoelectrons in the second case is 3 times that in the first case, the work function of the surface is :

Options:

Answer:

Solution:

$K . E_{λ} = \frac{h c}{λ} - ϕ$

$K . E_{\frac{λ}{2}} = \frac{h c}{\frac{λ}{2}} - ϕ$

$K . E_{\frac{λ}{2}} = 3 (K . E_{λ})$

$\Rightarrow ϕ = \frac{h c}{2 λ}$

Stream:JEESubject:PhysicsTopic:Modern PhysicsSubtopic:Photoelectric effect

⏱ 2mℹ️ Source: PYQ_2016

Doubts & Discussion

Loading discussions...