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A wedge-shaped film of air between two glass plates gives equally spaced dark fringes, using reflected sodium light, which are 0.22 mm apart. When monochromatic light of another wavelength is used the fringes are 0.24 mm apart. Explain why the two fringe spacings are different. (The incident light falls normally on the air film in both cases.) Discuss what you would expect to see if the air film were illuminated by both sources simultaneously. Calculate the wavelength of the second source of light. (Wavelength of sodium light = 589 nm (589 x 10- m).) [L]

A wedge-shaped film of air between two glass plates gives equally spaced dark fringes, using reflected sodium light, which are 0.22 mm apart. When monochromatic light of another wavelength is used the fringes are 0.24 mm apart. Explain why the two fringe spacings are different. (The incident light falls normally on the air film in both cases.) Discuss what you would expect to see if the air film were illuminated by both sources simultaneously. Calculate the wavelength of the second source of light. (Wavelength of sodium light = 589 nm (589 x 10- m).) [L]

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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A wedge-shaped film of air between two glass plates gives equally spaced dark fringes, using reflected sodium light, which are 0.22 mm apart. When monochromatic light of another wavelength is used the fringes are 0.24 mm apart. Explain why the two fringe spacings are different. (The incident light falls normally on the air film in both cases.) Discuss what you would expect to see if the air film were illuminated by both sources simultaneously. Calculate the wavelength of the second source of light. (Wavelength of sodium light = 589 nm (589 x 10- m).) [L)
Transcribed Image Text:A wedge-shaped film of air between two glass plates gives equally spaced dark fringes, using reflected sodium light, which are 0.22 mm apart. When monochromatic light of another wavelength is used the fringes are 0.24 mm apart. Explain why the two fringe spacings are different. (The incident light falls normally on the air film in both cases.) Discuss what you would expect to see if the air film were illuminated by both sources simultaneously. Calculate the wavelength of the second source of light. (Wavelength of sodium light = 589 nm (589 x 10- m).) [L)
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