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Chapter 36: Q37P (page 1112)
In a double-slit experiment, the slit separation d is 2.00 times the slit width w. How many bright interference fringes are in the central diffraction envelope?
The number of bright interference fringes that are in the central diffraction envelope is 3.
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A diffraction grating 20.0 mm wide has 6000 rulings. Light of wavelength 589 nm is incident perpendicularly on the grating. What are the
(a) largest,
(b) second largest,
(c) third largest values of at which maxima appear on a distant viewing screen?
Question:If someone looks at a bright outdoor lamp in otherwise dark surroundings, the lamp appears to be surrounded by bright and dark rings (hence halos) that are actually a circular diffraction pattern as in Fig. 36-10, with the central maximum overlapping the direct light from the lamp. The diffraction is produced by structures within the cornea or lens of the eye (hence entoptic). If the lamp is monochromatic at wavelength and the first dark ring subtends angular diameter in the observer鈥檚 view, what is the (linear) diameter of the structure producing the diffraction?
An astronaut in a space shuttle claims she can just barely resolve two point sources on Earth鈥檚 surface, 160 km below. Calculate their (a) angular and (b) linear separation, assuming ideal conditions. Take 位 = 540 nm and the pupil diameter of the astronaut鈥檚 eye to be 5.0 mm.
Figure 36鈥�35 shows the bright fringes that lie within the central diffraction envelope in two double-slit diffraction experiments using the same wavelength of light. Is (a) the slit width , (b) the slit separation , and (c) the ratio in experiment B greater than, less than, or the same as those quantities in experiment A?
In the single-slit diffraction experiment of ,let the wavelength of the light be , the slit width be localid="1664272054434" , and the viewing screen be at distance localid="1664272062951" . Let y axis extend upward along the viewing screen, with its origin at the center of the diffraction pattern. Also let represent the intensity of the diffracted light at point P at . (a) What is the ratio of to the intensity at the center of the pattern? (b) Determine where point P is in the diffraction pattern by giving the maximum and minimum between which it lies, or the two minima between which it lies.
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