An electron in a rigid box is in the ground state. The system absorbs a 9-eV photon putting the electron in the n = 2 state. What is the width of the box?
A)
1.8 × 10-10 m
B)
1.5 × 10-10 m
C)
2.5 × 10-10 m
D)
2.0 × 10-10 m
E)
3.5 × 10-10 m
E
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