An object is placed beyond the centre of curvature C of a given concave mirror. If the distance of the object from C is d1 and the distance of the image formed from C is d2, then the radius of curvature of this mirror 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: