Physics
How is the sign (+ or -) of power of a lens related to its divergent or convergent action?
Refraction Lens
22 Likes
Answer
Depending on the direction in which a lens deviates the light rays, its power is either positive or negative.
If a lens deviates a ray towards its centre (converges), the power is positive and if it deviates the ray away from its centre (diverges), the power is negative.
Hence, the power of a convex lens is positive and of a concave lens is negative.
Answered By
14 Likes