Answer: An air wedge is formed between two glass plates
Chapter 37, Problem 37(choose chapter or problem)
An air wedge is formed between two glass plates separated at one edge by a very fine wire of circular cross section as shown in Figure P37.37. When the wedge is illuminated from above by 600-nm light and viewed from above, 30 dark fringes are observed. Calculate the diameter d of the wire.
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