Question: A Fabri Perot interferometer with two plates separated by an air gap of 20 mm is used to study the hyperfine structure of the
A Fabri Perot interferometer with two plates separated by an air gap of 20 mm is used to study the hyperfine structure of the Hg green line (546nm). a) What is the free spectral range? b) If the reflectance of the surfaces is 90%, what is the finesse?
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