# WKB Approach

let,s suppose we have a particle with mass $$m\rightarrow\infty$$ then my question is if would be fair to make the WKB approach by setting the solution of the Schroedinguer equation as $$\phi=e^{iS/\hbar}$$ wiht S hte classical action satisfying the equation:

$$(dS/sx)^{2}+2m(V(x)-E_{n})=0$$ with E_n the Energies of the system....