For a Converging Lens with Two Convex Surfaces,the Radius of Curvature

question 4

Multiple Choice

For a converging lens with two convex surfaces,the radius of curvature for both surfaces is 20 cm.If the focal length is 10 cm,what must the index of refraction be?

• A) 1.5
• B) 2.5
• C) 2.0
• D) 3.0

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