1.

A lens has a power of +2.0 Dioptre, Which one of the following statements about the lens is true?

A. The lens is concave and has a focal length of 0.5 metre
B. The lens is convex and has a focal length of 2.0 metre
C. The lens is convex and has a focal length of 0.5 metre
D. The lens is concave and has a focal length of 2.0 metre
Answer» D. The lens is concave and has a focal length of 2.0 metre


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