Stokes shift is the difference (in wavelength or frequency units) between positions of the band maxima of the absorption and emission spectra (fluorescence and Raman being two examples) of the same electronic transition. It is named after Irish physicist George G. Stokes.

Based on that paragraph can we conclude that this sentence is true?
Stokes died 50 years ago.

Pick from:
a). Yes;
b). It's impossible to say;
c). No;
b).