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A Lens Is Made of Glass of Index of Refraction

Question 74

Multiple Choice

A lens is made of glass of index of refraction 1.60. If both the surfaces are convex and the radii of curvatures are 10 cm and 20 cm, the focal length of the lens in air is A) 11.1 cm. B) -11.1 cm. C) 25 cm. D) 33.3 cm. E) -33.3 cm. A lens is made of glass of index of refraction 1.60. If both the surfaces are convex and the radii of curvatures are 10 cm and 20 cm, the focal length of the lens in air is


A) 11.1 cm.
B) -11.1 cm.
C) 25 cm.
D) 33.3 cm.
E) -33.3 cm.

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