A convex lens can be regarded as a set of prisms and a glass slab, such that refracting angle of the prisms
continuously decrease in outward direction
The explanation for the correct answer:
(a)continuously decrease in an outward direction
A convex lens act as a prism and a glass slab only when the refracting angle of the prism decreases in an outward direction.
The explanation for the incorrect answer:
(b) continuously increases in an outward direction
On refraction in the prism, the refracting angle will not increase as the ray is moving from a denser to a rarer medium.
(c) None of these
Option (a) is correct.
A convex lens can be regarded as a set of prisms and a glass slab, such that refracting angle of the prisms continuously decrease in an outward direction.