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Chapter 35: Q80P (page 1078)
A thin film with index of refraction is placed in one arm of a Michelson interferometer, perpendicular to the optical path. If this causes a shift of 7.0 bright fringes of the pattern produced by light of wavelength , what is the film thickness?
The film thickness is .
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In Fig. 35-38, sourcesand emit long-range radio waves of wavelength , with the phase of the emission from ahead of that from source Bby .The distance from Ato detector Dis greater than the corresponding distance localid="1663043743889" by .What is the phase difference of the waves at D ?
A thin film of liquid is held in a horizontal circular ring, with air on both sides of the film. A beam of light at wavelength 550 nm is directed perpendicularly onto the film, and the intensity I of its reflection is monitored. Figure 35-47 gives intensity I as a function of time the horizontal scale is set by . The intensity changes because of evaporation from the two sides of the film. Assume that the film is flat and has parallel sides, a radius of , and an index of refraction of 1.40. Also assume that the film鈥檚 volume decreases at a constant rate. Find that rate.
A thin flake of mica (n = 1.58) is used to cover one slit of a double-slit interference arrangement. The central point on the viewing screen is now occupied by what had been the seventh bright side fringe (m = 7). If , what is the thickness of the mica?
In Fig. 35-45, two microscope slides touch at one end and are separated at the other end. When light of wavelength 500 nm shines vertically down on the slides, an overhead observer sees an interference pattern on the slides with the dark fringes separated by 1.2 mm. What is the angle between the slides?
Figure 35-25 shows two sources s1 and s2 that emit radio waves of wavelengthin all directions. The sources are exactly in phase and are separated by a distance equal to 1.5 . The vertical broken line is the perpendicular bisector of the distance between the sources.
(a) If we start at the indicated start point and travel along path 1, does the interference produce a maximum all along the path, a minimum all along the path, or alternating maxima and minima? Repeat for
(b) path 2 (along an axis through the sources) and
(c) path 3 (along a perpendicular to that axis).
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