An electron confined in a one-dimensional box is observed, at different times, to have energies of 27 eV , 48 eV , and 75 eV .
What is the length of the box? Hint: Assume that the quantum numbers of these energy levels are less than 10.
The Attempt at a Solution
I tried using that equation to solve for length, but I don't know what energy levels these are at, so i can't seem to solve it.