1.

The lens of power + 1.0 D is : (a) convex of focal length 1.0 cm (b) convex of focal length 1.0 m (c) concave of focal length 1.0 cm (d) concave of focal length 1.0 m

Answer»

The lens of power + 1.0 D is :

(a) convex of focal length 1.0 cm

(b) convex of focal length 1.0 m

(c) concave of focal length 1.0 cm

(d) concave of focal length 1.0 m



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