A Proton Is in a One-Dimensional Box of Length 2 $\times$

Multiple Choice

A proton is in a one-dimensional box of length 2 $\times$ 10^-15 m.What is the value of the energy of the n = 5 state divided by the energy of the n = 3 state?

A) 1.7
B) 16
C) 2.8
D) 2.0
E) 0.4