In our evaluation through statistical means we find that our best guest for the actual wavelength of the laser with error is \(525.7\ \pm0.7\) nm. In this method it was necessary to omit the S0 wavelength as a divide by zero error occurs.
Conclusion
Though our data and uncertainty did not enclose the actual wavelength of the laser which was 532 nm our best estimate for the laser was only 1% from the actual value of the laser which leads us to believe that there was some systematic error that caused our evaluation of the actual wavelength of the laser to shift down slightly. This is likely do to the difficulty in keeping the ruler exactly perpendicular to the wall. A better guess could be made by maintaining the laser perpendicular to the wall and offsetting the ruler at some necessary angle. In this way a square could be used to make sure the unmodified light coming from the laser maintains normal incidence with the wall.