Question

An object is placed at a distance of 15 cm from the convex lens of focal length 10 cm . on the other side of the lens , a convex mirror is placed such that its distance from the lens equals the focal length of the lens. The image formed by this combination is observed to coincide with the object itself. find the focal length of convex mirror..

Answer 1

converging lenses, the focal length is always positive, while diverging lenses always have negative focal lengths. However, these conventions are arbitrary, and physicists could ...