The work functions of Caesium (Cs), Potassium | vedclass

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(C) Photoelectric emission occurs only when the energy of the incident photon $(E)$ is greater than or equal to the work function $(\Phi_0)$ of the me

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Both $K$ and $Cs$

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(C) Photoelectric emission occurs only when the energy of the incident photon $(E)$ is greater than or equal to the work function $(\Phi_0)$ of the metal surface.Given incident energy $E = 2.41 \ eV$.Work functions are:For $Cs$: $\Phi_0 = 2.14 \ eV$For $K$: $\Phi_0 = 2.30 \ eV$For $Na$: $\Phi_0 = 2.75 \ eV$Comparing $E$ with $\Phi_0$:For $Cs$: $2.41 \ eV > 2.14 \ eV$ (Emission occurs)For $K$: $2.41 \ eV > 2.30 \ eV$ (Emission occurs)For $Na$: $2.41 \ eV Therefore, both $Cs$ and $K$ surfaces will emit photoelectrons.

The work functions of Caesium $(Cs)$, Potassium $(K)$, and Sodium $(Na)$ are $2.14 \ eV$, $2.30 \ eV$, and $2.75 \ eV$ respectively. If incident electromagnetic radiation has an incident energy of $2.41 \ eV$, which of these photosensitive surfaces may emit photoelectrons?

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