solution_pdf2 - McPartlin (anm464) assignment 9 frommhold...

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Unformatted text preview: McPartlin (anm464) assignment 9 frommhold (58025) 1 This print-out should have 6 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 16.66 points Assume that a camera has a fixed focal length of 57 . 9 mm and is adjusted to properly focus the image of a distant object. How far must the lens be moved to focus the image of object that is 2 . 95 m away? Correct answer: 1 . 15916 mm. Explanation: Given : p 2 = 2 . 95 m and f = 57 . 9 mm . To focus on a very distant object, the original distance from the lens to the film was q 1 = f = 57 . 9 mm. To focus on an object 2 . 95 m away, the thin lens equation gives 1 f = 1 p 2 + 1 q 2 1 q 2 = 1 f- 1 p 2 = p 2- f fp 2 q 2 = p 2 f p 2- f = (2950 mm) (57 . 9 mm) 2950 mm- 57 . 9 mm = 59 . 0592 mm Thus, the lens should be moved farther from the film by the distance q = q 2- q 1 = 59 . 0592 mm- 57 . 9 mm = 1 . 15916 mm ....
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This note was uploaded on 04/26/2009 for the course PHY 44135 taught by Professor Frommhold during the Spring '09 term at University of Texas at Austin.

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solution_pdf2 - McPartlin (anm464) assignment 9 frommhold...

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