How Do Electron Wavelengths Compare in Different Transitions?

[shlomo127]

Homework Statement

An electron makes a transition from the third energy level to the lowest energy level in a box of width 0.1 nm. what is the wavelength of the emitted photon? Compare this wavelength with the wavelength associated with the transition from the third energy level to the ground state level in hyrdogen. (The ground state energy of hydrogen is 13.6 eV. )

Homework Equations

The Attempt at a Solution

I am really lost. And this is one of the review questions for the test coming up.
Can anyone please get me started or at least point me in the right direction?
I would REALLY aprreciate it!
Thanks!

 

[Hootenanny]

How is the energy of the n^th level related to the width of the box?

 

[soul]

You should use the energy formula for the infinite-square well to obtain energy emitted, then I think you can use this energy in the formula of the photon and get the wavelength. Bohr energy equation can be used to find the energy for the hydrogen atom.