20. On the path of the rays interference refractometer placed tube length l = 2 cm with plane glass base filled with air (n0 = 1,000277). One tube filled with chlorine, and wherein the interference pattern is shifted to m = 20 bars. Determine the refractive index of chlorine if the observations are made with monochromatic light with a wavelength λ = 589 nm.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)