Question

write the differences between convex lens and concave lens​

Answer 1

Answer:

Concave describes shapes that curve inward, like an hourglass

Convex describes shapes that curve outward, like a football (or a rugby ball).

Answer 2

Answer:

A convex lens is thicker at the centre and thinner at the edges. A concave lens is thicker at the edges and thinner at the centre. Due to the converging rays, it is called a converging lens. Due to the diverging rays, it is called a diverging lens.