Figure 1 shows part of an energy level diagram for a hydrogen atom.
n=4 ------ -0.85eV
n=3 ------ -1.50eV
n=2 ------ -3.40eV
n=1 ------ -13.60eV
When an electron of energy 12.1eV collides with the atom, photons of three different energies are emitted.
[b]Calculate the wavelength of the photon with the smallest energy. Give your answer to an appropriate number of significant figures.
I get how to do most of this question but how do I know which is the photon with the smallest energy? I found it to be 0.65ev why is it 1.9ev?
Energy levels Watch
- Thread Starter
- 12-04-2013 13:28
- 12-04-2013 14:57
I think that you have to assume that the electron bound to the hydrogen atom is in the ground state before the collision. Does that make it clearer?