The WKB approximation
Slowly varying potentials: local wavelengths, tunneling through barriers of any shape with $e^{-2\int\kappa\,dx}$, and quantization by $\int p\,dx = (n + \tfrac{1}{2})\pi\hbar$.
About 35 minutes8 activities Paper packet
Slowly varying potentials: local wavelengths, tunneling through barriers of any shape with $e^{-2\int\kappa\,dx}$, and quantization by $\int p\,dx = (n + \tfrac{1}{2})\pi\hbar$.
About 35 minutes8 activities Paper packet