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## Homework Statement

Find the width L of a one-dimensional box for which n=5 level would correspond to the absolute value of the n=3 state of a hydrogen atom

## Homework Equations

am i suppose to use n

^{2}h

^{2}/8mL

^{2}where n=5 to equate it to the n=3 state of the hydrogen atom? which is -13.6eV/3

^{2}?

## The Attempt at a Solution

i am confuse. or am i suppose to be using some other equations? i don't really understand the question though. appreciate any help