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Physics

State difference between a convex and a concave lens in their —

(a) appearance, and

(b) action on the incident light.

Refraction Lens

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Answer

(a) The difference between a convex and a concave lens in terms of appearance is as follows —

Convex lensConcave lens
A convex lens is thick in the middle and thin at its periphery.A concave lens is thin in the middle and thick at its periphery.
It bulges out in the middle.It is bent inwards in the middle.

(b) The difference between a convex and a concave lens in terms of action on the incident light is as follows —

Convex lensConcave lens
A convex lens converges the incident rays towards the principal axis.A concave lens diverges the incident rays away from the principal axis.

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