(Long Answer Question) A spherical mirror is being discussed in a classroom session…
PHYSICS · Multi-part · CBSE · Physics · Light — Reflection and Refraction · Light — Reflection and Refraction
Problem
(Long Answer Question)
A spherical mirror is being discussed in a classroom session on image formation.
Answer the following in brief, using standard textbook terminology wherever required.
(i) Define the focal length f of a spherical mirror in terms of its radius of curvature R.
(ii) State the Cartesian sign convention for measuring (a) object distance u, (b) image distance v and (c) focal length f for concave and convex mirrors.
(iii) A spherical mirror has radius of curvature 40cm. Using the convention stated in part (ii), write the sign and numerical value of its focal length when the mirror is (a) concave, (b) convex.