A Convex-Concave Thin Lens Is Made with the Radius of Curvature

question 54

Multiple Choice

A convex-concave thin lens is made with the radius of curvature of the convex surface being 25.0 cm and the concave surface 45.0 cm.If the glass used has index of refraction 1.500,what is the focal length of this lens?

• A) -32.0 cm
• B) 32.0 cm
• C) 113 cm
• D) 67.5 cm
• E) -113 cm

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