Observe the figures given as Figure 15.1 carefully. Fig 15.1

The given figures show the path of light through lenses of two different types, represented by rectangular boxes A and B. What is the nature of lenses A and B?

Box A - covex lens

Box B - concave lens

in given figure, nature of lens A is convex as the convex lens generally converges the light rays falling on it i.e it bends the rays inwards. Convex lens is also called 'converging lens’.

nature of lens B is concave as the concave lens generally diverges the light rays falling on it i.e it bends the rays outwards. Concave lens is also called 'Diverging lens’.