A Lens of Focal Length 40 Mm Is Used as a Magnifier.The

question 53

Multiple Choice

A lens of focal length 40 mm is used as a magnifier.The object being viewed is 5.3 mm long,and is positioned at the focal point of the lens.The user of the magnifier has a near point at 25 cm.What is the angular magnification of the magnifier?

• A)6.3
• B)5.6
• C)6.9
• D)7.5
• E)8.1

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