Choose the one alternative that best completes the statement or answers the question. -The radius of curvature of the curved side of a plano-convex lens made of glass, having index of

Choose the one alternative that best completes the statement or answers the question.
-The radius of curvature of the curved side of a plano-convex lens made of glass, having index of refraction 1.64, is 33 cm. What is the focal length of the lens?
A) 52 cm
B) 21 cm
C) -52 cm
D) -21 cm

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