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 18
Q
By what percent is the speed of blue light (450 nm) less than the speed of red light (680 nm), in silicate flint glass (see Fig. 24–14)?
Figure 24-14 Index of refraction as a function of wavelength for various transparent solids.
A
-1.5%
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COMMENTS
By spanda2u on Sun, 11/22/2015 - 3:33 AM
oh, i thought red light has longer wavelengths and is slower than the shorter wavelengths of blue!
By Mr. Dychko on Mon, 11/23/2015 - 5:43 PM
Hi spanda2u, you're quite right that red has a longer wavelength, but indeed, as shown in the video, "chromatic dispersion" for most materials usually means the long wavelength colors travel faster. Here's the Wikipedia article (it's rather densely written unfortunately).
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