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Lecture_18 - Lecture 18-1 Lecture Newtons Ring The air...

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Lecture 18 - 1 The air between the glass plates acts like a thin film. • Since the thickness of the film changes over the radius of the plates, alternating bright and dark fringes form, when the plates are illuminated. Because of the curvature of the upper piece, the film thickness varies more rapidly at larger radius. Thus the fringe separation is smaller toward the outside . Newton’s Ring
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