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A thin double convex lens is to focus the image of an object onto a screen so th

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A thin double convex lens is to focus the image of an object onto a screen so th

A thin double convex lens is to focus the image of an object onto a screen so that the image is life-sized. The lens has equal radii of 58 cm and the refractive index is n = 1.3. (a) What is the distance d from image to screen? (b) What is the total distance L between object and image?
A) (a)   d = 193 cm
(b)   L = 386 cm
B) (a)   d = 386 cm
(b)   L = 772 cm
C) (a)   d = 97 cm
(b)   L = 49 cm
D) (a)   d = -193 cm
(b)   L = -386 cm

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Thanks for the physics help.

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