1. The problem statement, all variables and given/known data Consider a finite square-well potential well of width 3.00x10-15 m that contains a particle of mass 1.88 GeV/c2. How deep does the well need to be to contain three energy levels? 2. Relevant equations 3. The attempt at a solution I think I have to use the formula for penetration density: δx=(hbar)/(sqrt(2m(V0-E))) V0=0 because the particle is inside the well. Would I use: En=(n-1/2)(hbar)ω to find the energy of three levels? Then would I plug this formula back into the penetration density formula to find the penetration density? Thank you.