Chapter 13, Problem 13.66E

Interpretation Introduction

Interpretation:

The given statement that $s\to s$ transitions are not allowed in the hydrogen atom is to be validated. The value of integral ${\displaystyle \int {\Psi }_a{\left(s\right)}^{*}\stackrel{⌢}{O}{\Psi }_b\left(s\right)}d\tau$ is exactly equal to zero is to be stated.

Concept introduction:

The group of symmetry operations of which atleast one point is kept fixed is called point group. The symmetry operations can be identity, rotation, reflection, inversion and improper rotation.