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CH 25 soln

# CH 25 soln - OPTICAL INSTRUMENTS 25 9 A D 10 B C E 11 D 12...

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25-1 O PTICAL I NSTRUMENTS 25 Answers to Multiple-Choice Problems 1. C 2. B 3. E 4. C 5. C 6. B, D 7. D 8. C 9. A, D 10. B, C E 11. D 12. B 13. D 14. A 15. D Solutions to Problems 25.1. Set Up: The N is and is expressed as The exposure time is inversely proportional to the aperture diameter. Solve: (a) means and (b) If t is the exposure time, then For Reflect: Larger means smaller aperture diameter and larger exposure time. 25.2. Set Up: The exposure time is inversely proportional to the aperture area. Solve: If t is the exposure time, then 25.3. Set Up: The notation means an of N . Solve: A: B: C: D: E: F: The order is B, A, C, D, F, E. 25.4. Set Up: means an of N . for the telephoto lens and for the second lens. The light intensity is proportional to Solve: (a) For D 5 135 mm 11 5 12 mm. f / 11, D max 5 135 mm 2.8 5 48 mm. D min 5 135 mm 22 5 6.1 mm; D 2 . f 5 50 mm f 5 135 mm f -number f / N f -number 5 f D . D 5 350 mm 8 5 44 mm. D 5 250 mm 5.6 5 45 mm; D 5 100 mm 3.5 5 29 mm; D 5 50 mm 2.0 5 25 mm; D 5 35 mm 2.5 5 14 mm; D 5 28 mm 1.7 5 16 mm; D 5 f f -number . f -number f / N f -number 5 f D . t 2 5 t 1 1 D 1 D 2 2 2 5 A 1 30 s B 1 8.00 mm 23.1 mm 2 2 5 1 250 s. t 1 t 2 2 A 2 A 1 5 1 4 p D 2 2 1 4 p D 1 2 5 1 D 2 D 1 2 2 . f -number t 2 5 t 1 1 D 1 D 2 2 2 5 A 1 250 s B 1 75 mm 37.5 mm 2 2 5 4 250 s 5 1 62.5 s D 5 f 8 5 37.5 mm. f / 8, t 1 t 2 2 A 2 A 1 5 1 4 p D 2 2 1 4 p D 1 2 5 1 D 2 D 1 2 2 . D 5 f 4 5 300 mm 4 5 75 mm. f D 5 4 f / 4 f / N . N 5 f D f -number

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25-2 Chapter 25 (b) (c) (d) Keep constant, where t is the time the shutter is open. so The closest shutter speed setting is 25.5. Set Up: The image is real since it is projected onto the film. Solve: Reflect: The object distance s is much greater than so the image is just beyond the focal point of the lens. 25.6. Set Up: The image is real since it is projected onto the film. is the distance from the lens to the film plane. Solve: (a) Since the image is real the lens must be convex. (b) For For gives The range of distances is 50 mm to 56 mm. 25.7. Set Up: The photocells must be at the image location. Solve: (a) (b) The image is inverted and 3.33 cm tall. so the image is real. (c) Reflect: Since the image is projected onto the photocell, it must be real. Any real image formed by a single lens is inverted. 25.8. Set Up: The image is real since it is projected onto the film and is the distance from the lens to the film. and Solve: so This is greater than the largest dimension of the film; the entire image of the person won’t fit on the film. 25.9. Set Up: You want The image will be real, so and Solve: (a) Use this in and (b) s r 5 0.0180 s 5 5.09 cm s 5 2.83 m. 1 s 1 1 0.0180 s 5 1 50.0 3 10 2 3 m 1 s 1 1 s r 5 1 f : s r 5 2 ms 5 2 1 2 0.0180 2 s 5 0.0180 s . m 5 y r y 5 2 36 3 10 2 3 m 2.00 m 5 2 0.0180. y r 5 2 36 mm. m , 0 s r . 0, f 5 50.0 mm. 0 y r 0 5 36 mm. m 5 2 s r s 5 y r y . 1 s 1 1 s r 5 1 f . 0 y r 0 5 y 0 m 0 5 1 175 cm 21 0.0223 2 5 3.90 cm 5 39.0 mm. m 5 y r y m 5 2 s r s 5 2 8.7 cm 390 cm 5 2 0.0223. s r 5 sf s 2 f 5 1 390 cm 21 8.5 cm 2 390 cm 2 8.5 cm 5 8.7 cm.
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CH 25 soln - OPTICAL INSTRUMENTS 25 9 A D 10 B C E 11 D 12...

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