Embibe Experts Solutions for Chapter: Electrons and Photons, Exercise 1: Maharashtra Board-2019

The work function for a metal surface is $2.2 \mathrm{eV}$. If light of wavelength $5000 \stackrel{0}{\mathrm{A}}$ is incident on the surface of the metal, find the threshold frequency and incident frequency. Will there be an emission of photoelectrons or not?

$\left(c=3\times {10}^8 \mathrm{m} {\mathrm{s}}^{-1}, 1 \mathrm{eV}=1.6\times {10}^{-19} \mathrm{J}, h=6.63\times {10}^{-34} \mathrm{Js}\right)$

What is photoelectric effect? Define Stopping potential.

What is the photoelectric effect? Define Photoelectric work function.

Define threshold frequency.

Define photoelectric work function.

The photoelectric work function for a metal surface is $3.84\times {10}^{-19}\mathrm{J}$. If the light of wavelength $5000$ $\mathrm{A}$ is incident on the surface of the metal, will there be photoelectric emission?