If f is the focal length of the specified mirror, match their value based on sign convention.
According to New Cartesian Sign Convention : (a) focal length of concave mirror is positive and that of convex mirror is negative (b) focal length of both concave and convex mirrors is positive (c) focal length of both concave and convex mirrors is negative (d) focal length of concave mirror is negative and that of convex mirror is positive
According to the "New Cartesian Sign Convention" for mirrors, what sign has been given to the focal length of : (i) a concave mirror ? (ii) a convex mirror ?