A Double-Convex Lens Is Made of Glass of Refractive Index

question 43

Multiple Choice

A double-convex lens is made of glass of refractive index 1.50.The radii of curvature of the surfaces are 10 cm and 20 cm.The focal length of this lens is

• A)4.45 cm
• B)13.3 cm
• C)-13.3 cm
• D)40 cm
• E)-40 cm

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