A total of 31 bright and 31 dark Newton’s rings (not
Chapter 27, Problem 43P(choose chapter or problem)
(II) A total of 31 bright and 31 dark Newton’s rings (not counting the dark spot at the center) are observed when 550-nm light falls normally on a planoconvex lens resting on a flat glass surface (Fig. 24–31). How much thicker is the center than the edges?
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