In an experiment with a convex lens, the height of a real image is 1 cm, and the object height is 5 cm. If the object is placed at a distance of 40 cm from the lens, then the focal length of the lens is:

What are the characteristics of an image formed by a plane mirror?

Given below are two statements: an Assertion [As] and a Reason [R]. Assertion [As]: A convex mirror cannot form real images of real objects. Reason [R]: Convex mirrors converge the parallel rays of light that are incident on them. Choose the correct alternative: