According to the "New Cartesian Sign Convention" for mirros, when sigh has been given to the focal length of :
(i) a concave mirror ?
(ii) a convex mirror ?

Options

A. focal length of concave mirror is negative that of conved mirror is positive
B. focal length of concave mirror is positive and that of convex mirror is negative
C. focal length of both concave and convex mirrors is negative
D. Focal length of both concave and convex mirrors is positive

Answer

A

Explanation

Explanation: In case of concave mirror, the centre of curvature and focus lie in front of the surface of the mirror. Thus, the radius of curvature and focal length are taken as negative.