A person is to be fitted with bifocals. She can see clearly when the object is between
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A person is to be fitted with bifocals. She can see clearly when the object is between 30 cm and 1.5 m from the eye.(a) The upper portions of the bifocals (Figure.) should be designed to enable her to see distant objects clearly. What power should they have?(b) The lower portions of the bifocals should enable her to see objects comfortably at 25 cm. What power should theyhave?
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a b The upper portion of the lens should for...View the full answer
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Related Book For 
College Physics
ISBN: 978-0495113690
7th Edition
Authors: Raymond A. Serway, Jerry S. Faughn, Chris Vuille, Charles A. Bennett
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