16) Suppose the two glass plates of Fig.-5 are precision ground slides, each 10

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16) Suppose the two glass plates of Fig.-5 are precision ground slides, each 10 cm long. On looking at the slides from above, a thin-film interference pattern is Observed, where the interference fringes are evenly spaced At one end the plates are in contact, and at the other end they are separated by a thin piece of paper 0.0200 mm thick. Fig.-5 Schematic for problem #16. What is the spacing of the interference fringes seen by reflection? Assume that monochromatic light with wavelength lambda = 500 nm is used to illuminate the setup. Choose from the answers provided below. a) x = 2 mm b) x = 4 mm c) x = 25 mm d) x = 1.25 mm e) x = 0.2 mm

Explanation / Answer

my answer is A

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