Chapter 14, Problem 14.20P

To determine

To Derive:The unit of a in the equation $\alpha =\omega \sqrt{\frac{\mu \epsilon }{2}}{\left[{\left\{1+{\left(\frac{\sigma }{\omega \epsilon }\right)}^2\right\}}^{-\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$2$}\right.}-1\right]}^{\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$2$}\right.}$ is per meter using dimensional analysis.