Chapter 7, Problem 7.5QP

Interpretation Introduction

Interpretation:

A quantum, Planck’s quantum theory and the units for Planck’s constant should be explained.

Concept Introduction:

Based on blackbody radiation experiments, Max Planck proposed that radiant energy could be emitted or absorbed only in discrete quantities like small packages or bundles.  Planck gave the name quantum to the smallest quantity of energy that can be emitted (or absorbed) in the form of electromagnetic radiation.  The energy ‘$\text{E}$’ of single quantum energy is given by

$\text{E }=\text{ hν}$

Where $\text{h}$ = Planck’s constant ($6.626\times {10}^{–34}\text{ Js}$); $\text{ν}$ = frequency of radiation.  The value of $\text{h}$ is constant which is $6.626\times {10}^{–34}\text{ Js}$.  Thus, Planck’s constant gets the unit of $\text{Js}$.