1. Nov 30, 2004

### stunner5000pt

UNLIke most of the people who keep bumping their thread up by posting in it, i will bump this post up like that and SHAME ON YOU FOR NOT POSTING PART SOLUTION FOR YOUR EFFORT

but on to the question i have

The mean lifetime of the hydrogen atom in the first excited state is 10ns

What is the mean number of time an electron in the first excited state will revolve about the nucleus before returning to the ground sate with emission of a photon?

first of all n = 2, first EXCITED state

now i know $$\Delta E \Delta t \geq \frac{h}{2 \pi}$$

i can calculate the energy of the electron in this state but the mean number of times?? Is there something in the statistics that im not geting here???

Last edited: Nov 30, 2004
2. Nov 30, 2004

### Staff: Mentor

Hint: Use the Bohr model of the atom to figure out the time it takes for one revolution.