# Mathematica notebook not working

1. Mar 1, 2010

### Shukie

1. The problem statement, all variables and given/known data
I am trying to find Rydberg's constant. I took measurements using a spectroscope and now I want to do a NonLinearModelFit on the following function:

$$\theta = \theta_0 + \alpha + \Arcsin{p k - \Sin{\alpha}}$$

Where p is 1/(d*Rh). I know $$d$$ and so I can calculate $$R_H$$ if I know $$p$$. Problem is, I can not get the fit method to work in mathematica, but I don't see what is wrong.

3. The attempt at a solution

View attachment 24028

Could anyone please take a look?

Last edited: Mar 1, 2010
2. Mar 2, 2010

### Mapes

Try giving p an initial value of 0.