1020_Physics ProblemsTechnical Physics

1020_Physics ProblemsTechnical Physics - Chapter 36 P36.30...

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Chapter 36 361 P36.30 For a converging lens, f is positive. We use 111 pq f += . (a) 1 20 0 1 40 0 1 40 0 qfp = =−= ... cm cm cm q = 40 0 . cm M q p =− =− = − 40 0 40 0 100 . . . The image is real, inverted , and located 40.0 cm past the lens. (b) 1 20 0 1 20 0 0 = .. cm cm q = infinity No image is formed. The rays emerging from the lens are parallel to each other. (c) 1 20 0 1 10 0 1 20 0 = . cm cm cm q =− 20 0 M q p = 20 0 10 0 200 . . . af The image is upright, virtual and 20.0 cm in front of the lens. P36.31 (a) 1 25 0 1 26 0 cm cm q = 650 cm
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