## when to use which formula

H-Atom ($E_{n}=-\frac{hR}{n^{2}}$)

Samantha Hoegl Roy 2C
Posts: 81
Joined: Fri Sep 28, 2018 12:15 am

### when to use which formula

when would you use En = - hR / n^2 or En = h^2n^2/8mL^2?

ChathuriGunasekera1D
Posts: 78
Joined: Fri Sep 28, 2018 12:17 am

### Re: when to use which formula

I think you use the first equation when finding the energy change from one energy level to another, and the second equation when the question specifically mentions a side length, or something like "box".