A Converging Lens with Two Convex Surfaces Has a Front

question 38

Multiple Choice

A converging lens with two convex surfaces has a front surface with radius of curvature of 14.0 cm;the back surface has radius of curvature of 24.0 cm,and it is made from material with an index of refraction of 2.90.What is the focal length of the lens?

• A) 4.7 cm
• B) 17.7 cm
• C) −17.7 cm
• D) 3.0 cm
• E) 11.6 cm

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