352CHAPTER 25 (c) The angular magnification is 3.00oefmf==, giving 3.00of=ef. Also, the length of the telescope is 3.0010.0 cmoee eLf ff f=+=− =, giving 10.0 cm5.00 cm2.00eeff=−= −and 3.0015.0 cm25.31The lens for the left eye forms an upright, virtual image at 50.0 cmLq= −when the object distance is , so the thin lens equation gives its focal length as 25.0 cmLp=()( )25.0 cm25.0 cmLLRq50.0 cm50.0 cm50.0 cmLpqf−=+−100 cmSimilarly for the other lens, = −Rpwhen 25.0 cm=, and . 33.Rf=3 cm(a) Using the lens for the left eye as the objective, 50.0 cm1.5033.3 cm
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