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

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(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

Vedclass · Accepted Answer

Both $K$ and $Cs$

Vedclass · Answer

(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?

Similar Questions

Which of the following does not support the wave nature of light?

The minimum energy required to remove an electron from the surface of a metal is called:

The graph given in the figure shows the variation of photocurrent $(I)$ with the applied voltage $(V)$ for two different materials and for two different intensities of incident radiation. Which of the following pairs of curves represent the same material?

In the photoelectric effect,if a radiation of weak intensity is used instead of a radiation of strong intensity,but of the same suitable frequency,then:

The figure shows a plot of photo current versus anode potential for a photo sensitive surface for three different radiations. Which one of the following is a correct statement?

Vedclass Test Series

Exam Paper Generator

Online Exam Module