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Thin-film window coatings for energy conservation and comfort Thin-film coatings are applied to eyeglasses, computer screens, and automobile instrument panels to reduce glare and to binocular and camera lenses to increase the amount of light transmitted. Thin-film coatings are also used to add color to architectural glass, to reduce surface friction, and to improve the energy efficiency of windows Consider this latter application.
Figure 24.30 shows that over
A1.25 refractive index thin film on a 1.50 refractive index glass window is made to reflect infrared radiation of wavelength 1000 nm. What is the desired thickness of the thin film?
a. 200 nm
b. 250 nm
c. 400 nm
d. 500 nm
e. 1000 nm

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Chapter 24 Solutions
College Physics
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