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1024_Physics ProblemsTechnical Physics

1024_Physics ProblemsTechnical Physics - Chapter 36*P36.43...

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Chapter 36 365 *P36.43 In the first arrangement the lens is used as a magnifying glass, producing an upright, virtual enlarged image: M h h q p q p = = = = − = − = − = − 120 33 3 33 3 33 3 20 667 cm 3.6 cm cm cm . . . a f For the lens, 1 1 1 1 20 1 667 1 20 62 p q f f f + = = + = = cm cm cm . In the second arrangement the lens us used as a projection lens to produce a real inverted enlarged image: = − = − 120 33 3 2 2 cm 3.6 cm . q p q p 2 2 33 3 = . 1 1 33 3 1 20 62 2 2 p p + = . . cm 34 3 33 3 1 20 62 2 . . . p = cm p 2 21 24 = . cm The lens was moved 21 24 20 0 1 24 . . . cm cm cm = . Section 36.5 Lens Aberrations P36.44 (a) The focal length of the lens is given by 1 1 1 1 1 53 1 00 1 32 5 1 42 5 34 7 1 2 f n R R f = F H G I K J = F H G I K J = − a f a f . . . . . cm cm cm Note that
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