Question

Derive the relation between Einstein coefficients.

Answer 1

$\begin{tabular}{|c|c|c|c|c|c|c|c|} \cline{1-8}Atom\:(y&1.0&1.5&2.0&2.5&3.0&3.5&4.0\\ \cline{1-8} \end{tabular}$