Question

an object is placed at a distance of 30 cm in front of the concave mirrors nd its focal length is 15 cm. List 4 characteristics of the image formed by the lens.

Answer 1

A convex lens is thicker at the centre than at the edges. ... When parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus. The distance between the principal focus and the centre of the lens is called the focal length.