An Electron Is Confined in a Two-Dimensional Box Where U(x,y)=

Multiple Choice

An electron is confined in a two-dimensional box where U(x,y) = 0 for x = 0 to L,and y = 0 to 3L,and U(x,y) = infinity outside these boundaries.If L = 0.5 nm then calculate the energy of the first doubly degenerate levels.

A) 9.9 eV
B) 11.0 eV
C) 8.5 eV
D) 7.7 eV
E) 6.2 eV