Question

define convex lens or concave mirror​

Answer 1

Answer:

Convex lens is a lens which is thicker in the middle and thinner at the edges

Concave mirror is a spherical mirror whose inner hollow surface is reflecting surface.

Answer 2

Explanation:

convex lens or converging lens focuses the light rays to a specific point whereas a concave lens or diverging lens diverges the light rays. A lens is a transparent material (either curved or flat surface) based on the principles of refraction.