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Question #88059
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If the power of a lens is +4.0 D, what does this mean for its focal length and type?
A. It is a concave lens with a focal length of -0.25 meters
B. It is a convex lens with a focal length of +0.25 meters
C. It is a convex lens with a focal length of -0.25 meters
D. It is a concave lens with a focal length of +0.25 meters
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