A lens has a power +2.0 D. The type of lens and its focal length will

1.	A lens has a power +2.0 D. The type of lens and its focal length will be
A.	Concave, -0.5 m
B.	Convex, 0.5 m
C.	Concave, 0.5 m
D.	Convex, -0.5 m
Answer» C. Concave, 0.5 m

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