45 Example 3.3 A double-slit interference pattern is produced on a screen, as shown in Fig....
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45 Example 3.3 A double-slit interference pattern is produced on a screen, as shown in Fig. a. The light is monochromatic at a wavelength of 600 nm. A strip of transparent plastic with index of refraction n-1.50 is to be placed over one of the slits. Its presence changes the interference between light waves from the two slits, causing the interference pattern to be shifted across the screen from the original pattern. Fig. a shows the original locations of the central bright fringe (m-0) and the first bright fringe (m1) above and below the central fringe. We want the presence of the plastic over one slit to shift the pattern upward, with the lower m 1 bright fringe being shifted to the center of the pattern. Should the plastic be placed over the top slit or the bottom slit, and what thickness L should it have? Plastic (a) m == 1 m=0 m= (b) m=0 m m=2 45 Example 3.3 A double-slit interference pattern is produced on a screen, as shown in Fig. a. The light is monochromatic at a wavelength of 600 nm. A strip of transparent plastic with index of refraction n-1.50 is to be placed over one of the slits. Its presence changes the interference between light waves from the two slits, causing the interference pattern to be shifted across the screen from the original pattern. Fig. a shows the original locations of the central bright fringe (m-0) and the first bright fringe (m1) above and below the central fringe. We want the presence of the plastic over one slit to shift the pattern upward, with the lower m 1 bright fringe being shifted to the center of the pattern. Should the plastic be placed over the top slit or the bottom slit, and what thickness L should it have? Plastic (a) m == 1 m=0 m= (b) m=0 m m=2
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Financial and Managerial Accounting the basis for business decisions
ISBN: 978-0078111044
16th edition
Authors: Jan Williams, Susan Haka, Mark Bettner, Joseph Carcello
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