Giancoli's Physics: Principles with Applications, 7th Edition
24
The Wave Nature of Light
Change chapter24-3: Double-Slit Interference
24-4: Visible Spectrum; Dispersion
24-5: Single-Slit Diffraction
24-6 and 24-7: Diffraction Gratings
24-8: Thin-Film Interference
24-9: Michelson Interferometer
24-10: Polarization
Question by Giancoli, Douglas C., Physics: Principles with Applications, 7th Ed., ©2014, Reprinted by permission of Pearson Education Inc., New York.
Problem 52
Q
A fine metal foil separates one end of two pieces of optically flat glass, as in Fig. 24–33. When light of wavelength 670 nm is incident normally, 24 dark bands are observed (with one at each end). How thick is the foil?
Figure 24-33 (a) Light rays reflected from the upper and lower surfaces of a thin wedge of air (between two glass plates) interfere to produce bright and dark bands.
Figure 24-33 (b) Pattern observed when glass plates are optically flat;
Figure 24-33 (c) pattern when plates are not so flat. See Example 24–10.
A
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