3) A Fabry-Perot interferometer with fixed plate spacing t = 1.50mm is used to examine filtered light from a helium lamp, with wavelength lambda = 587.56nm. The plates have reflectance R = 0.950.
a) What is the free spectral range (in nm) for this spacing t and wavelength lambda?
b) What is the smallest resolvable wavelength difference for this setup?
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The solution is attached below (next to the paperclip icon) in two formats. one is in Word XP ...
This solution provides explanation of how to find the free spectral range, and what the smallest resolvable wavelength is.