A Converging Lens with Two Convex Surfaces Has a Front

question 1

Multiple Choice

A converging lens with two convex surfaces has a front surface with radius of curvature of 10.0 cm;the back surface has radius of curvature of 30.0 cm,and the lens is made from material with an index of refraction of 2.50.What is the focal length of the lens?

• A) −13.3 cm
• B) 4.44 cm
• C) 5.00 cm
• D) 0.250 cm

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