Chapter 27, Problem 36A

To determine

A quantum of light.

Explanation of Solution

Introduction:

A quantum of light is called a photon.

  $E=hf=\frac{hc}{\lambda }$

Einstein was a scientist who explained the particle nature of light. He described that a particle of light called photon having energy $E$ is related to frequency $f$ and wavelength $\lambda$ of light as follows:

  $E=hf=\frac{hc}{\lambda }$

Where, c is the speed of light in vacuum and $h$ is Planck’s constant.