Electron in a box - calculate the spring constant

1. The problem statement, all variables and given/known data
Electron in a box has 2 sequential energy levels of 1.5 eV and 2.1 eV
Calculate the spring constant

2. Relevant equations
Therefore, 2.1/1.5 = 1.4 = (6^2)/(5^2) and the quantum levels are 5 and 6
E[0] = (h^2)(pi^2)/2(m)(L^2)

3. The attempt at a solution
What is the "spring constant" for the wave equation??


Homework Helper
I think the question is connected to the time dependence of the wave function, but I am not sure...


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