Chapter 4, Problem 23P

Interpretation Introduction

Interpretation:

The color of light from which the surface of potassium can eject with a higher kinetic energy is to be determined.

Concept introduction:

The photoelectric effect refers to the ability of a light beam to eject photoelectrons from a surface of a metal when the light is directed on to the surface of the metal. There, we can calculate the maximum kinetic energy of the ejected electrons using the following equation.

  $E_{\max }=\frac{1}{2}m{v}_e{}^2=hv-\varphi$