## Electron Transitions

Claudia Luong 4K
Posts: 59
Joined: Fri Sep 28, 2018 12:25 am

### Electron Transitions

I was doing the problems on the worksheet that one of the UAs posted (worksheet #2), and I need help on number 7. The problem is "An excited hydrogen atom emits light with a frequency of 1.14x10$1.14x10^{14}$ Hz to reach the energy level for which n=4. In what principle quantum level did the electron begin?" I keep getting n=3 as my final answer, but the solution says the answer is n=6. Anyone else have this problem too or am I doing something wrong?

604656370
Posts: 30
Joined: Fri Sep 28, 2018 12:25 am

### Re: Electron Transitions

Did you use this equation: $v = -R[1/n_{1}^{2} - 1/n_{2}^{2}]$ ? If you use this, which is derived from
$E_{n} = -hR/n^{2}$ you should get the right answer.