Again let the applied field be B=833 mT. But now the two first-order rings have diameters of d1,a = 6.96 cm and d1b = 8.40 cm, while the two second-order rings have diameters of d2,a = 11.06 cm and d2,b = 12.25 cm. (Relevant parameters for the Fabry-Perot spectrometer are the index of refraction for red light y = 1.4560 and its thickness t=3 mm) From the areal difference between the second-order rings (82;b,a), normalized by the areal difference between orders (2,1:c), the Bohr magneton value is is MB x10-24 J/T