Question: A particle of mass m is located in a two-dimensional square potential well with absolutely impenetrable walls. Find: (a) The particle's permitted energy values if

A particle of mass m is located in a two-dimensional square potential well with absolutely impenetrable walls. Find:
(a) The particle's permitted energy values if the sides of the well are l1 and l2;
(b) The energy values of the particle at the first four levels if the well has the shape of a square with side l.

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