Calculating Satellite Line Splitting in a Sunspot using the Zeeman Effect

[interdinghy]

Homework Statement

"The normal Zeeman effect splits a spectral line at frequency \nu_{0} and two satellite lines at \nu_{0} ± eB/(4\pi m_{e}). By what amount (in angstroms) are the satellite lines of the hydrogen Balmer \alpha line (\lambda_{0} = 6562.81 Å) split from the central component in a typical sunspot?

Given value for B in a sunspot: .1 T

Homework Equations

\lambda = c/\nu
d\lambda = c d/d\nu

The Attempt at a Solution

I've tried plugging things into eB/(4\pi m_{e}) to find the change in frequency for the satellite lines, but I'm not getting a value in hertz, so I'm not exactly sure what I'm doing wrong. I'm pretty sure that once I get an actual frequency out of this I can just use the relevant equations to find the difference in wavelength.

 

[frogjg2003]

Did you calculate the individual wavelengths and take their difference? or did you calculate the difference in frequency and calculate a wavelength with that?

 

[interdinghy]

If I calculate the frequency based off the given wavelength, I get 4.56*10^14 hertz, but that doesn't get me any further I don't think.

The problem is the difference between the initial frequency and the satellite lines. I can't add or subtract the difference because the difference isn't a frequency, it's some nonsense units (seconds^-2 ampere^-1).

 

[frogjg2003]

Try writing out the units of each piece in the SI base units. See what happens.

 

[interdinghy]

Try writing out the units of each piece in the SI base units. See what happens.

I think this is maybe where I'm missing something?

A tesla divided by an electron mass is giving me 1 per second per ampere, and wolfram seems to agree with this.

\nu_{0} + s^{-1}A^{-1} = Hz + s^{-1}A^{-1} is adding incompatible units, so I'm pretty sure I can't do it.

 

[frogjg2003]

What about the electron charge?

 

[frogjg2003]

Also, I'm getting per second squared in Wolfram.

 

[interdinghy]

Oh okay I see now. I was so sure e was the base of the natural log. I actually tried looking around for other things it could stand for, but putting it in as the electron charge on wolfram made it work.

Thanks!