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Chapter 35: Q79P (page 1078)
If mirror in a Michelson interferometer (fig 35-21) is moved through , a shift of 792 bright fringes occurs. What is the wavelength of the light producing the fringe pattern?
The wavelength of light producing is .
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In Fig. 35-44, a broad beam of light of wavelength 630 nm is incident at 90掳 on a thin, wedge-shaped film with index of refraction 1.50. Transmission gives 10 bright and 9 dark fringes along the film鈥檚 length. What is the left-to-right change in film thickness?
In a double-slit experiment, the fourth-order maximum for a wavelength of 450 nm occurs at an angle of . (a) What range of wavelengths in the visible range (400 nm to 700 nm) are not present in the third-order maxima? To eliminate all visible light in the fourth-order maximum, (b) should the slit separation be increased or decreased and (c) what least change is needed?
In Fig. 35-31, a light wave along ray reflects once from a mirror and a light wave along ray reflects twice from that same mirror and once from a tiny mirror at distance from the bigger mirror. (Neglect the slight tilt of the rays.) The waves have wavelength and are initially exactly out of phase. What are the (a) smallest (b) second smallest, and (c) third smallest values of that result in the final waves being exactly in phase?
In the two-slit experiment of Fig.35-10, let angle be , the slit separation be , and the wavelength be . (a) What multiple of gives the phase difference between the waves of rays and when they arrive at point on the distant screen? (b) What is the phase difference in radians? (c) Determine where in the interference pattern point lies by giving the maximum or minimum on which it lies, or the maximum and minimum between which it lies?
Two rectangular glass plates are in contact along one edge (fig-35-45) and are separated along the opposite edge . Light with a wavelength of 600 nm is incident perpendicularly onto the top plate. The air between the plates acts as a thin film. Nine dark fringes and eight bright fringes are observed from above the top plate. If the distance between the two plates along the separated edges is increased by 600 nm, how many dark fringes will there then be across the top plate.
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