Sunday, July 9, 2017
Scaling Factors That Could Potentially Affect Huggins' Hydrogen Lines
Relative to the minimum deflection wavelength for Huggins' spectroscope there appears to be a progressive shift to higher wavenumbers which is a blue shift. But relative to the limit of the series, λ∞, there is a redshift. There are a number of factors which might cause a scale change in the observed wavelengths and need to be taken into consideration.
Calibration of the Spectroscope
Air Wavelengths vs Vacuum Wavelengths
Definition of standard conditions
Snell's Law (measurement in air results in a blue shift relative to a vacuum )
Rydberg Constant (R∞ is for a vacuum)
RM needed for light nucleus (R∞ is for a heavy nucleus)
All of the above contribute to a change in scale. What did Huggins miss?