A Newtons rings apparatus is to be used to determine the
Chapter , Problem 77(choose chapter or problem)
A Newtons rings apparatus is to be used to determine the radius of curvature of a lens (see Fig. 35- 46 and 75). The radii of the nth and (n ' 20)th bright rings are found to be 0.162 and 0.368 cm, respectively, in light of wavelength 546 nm. Calculate the radius of curvature of the lower surface of the lens
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