rome File Edit View History Bookmarks People Window Help Mastering Physics: pp25

Question

rome File Edit View History Bookmarks People Window Help Mastering Physics: pp25 secure 73817085 Phy 284 Sp17 pp25 Problem 2442 Problem 24.42 Part A You want to use a lens with a focal length of 32.5 What kind of lens do you need? cm to produoe a real image of object, with the image twice as long as the object itself. diverging lens converging lens O Boo Submit Mo Answers Give Up Correct TUT Part B Where should the object be placed? Express your answer with the appropriate units. Value cm My Answers Give Up 54% D Thu Mar 30 724 PM previous I 1 of 2 l neat

Explanation / Answer

24.42] B] 1/f = 1/v + 1/u

v = 2u

so, 1/32.5 = 1/(2u) + 1/u

=> u = object distance = 48.75 cm

=> v = 97.5 cm.

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