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## Homework Statement

An electron is bound in a square well of depthU0=6E1−IDW.

What is the width of the well if its ground-state energy is 2.50 eV ?

## Homework Equations

En = h

^{2}n

^{2}/8mL

^{2}

## The Attempt at a Solution

I used n = 1

so I get:

25eV*1.6*10

^{-19}= h

^{2}/8*9.11*10

^{-31}*L

^{2}

I got L = .388 nm. It wasn't correct. I ignored the depth part at the beginning since I thought it was irrelevant, but it might not be