Frank ICSE Solutions for Class 9 Physics - Light: Spherical Mirrors PAGE NO: 258 Solution 1: A spherical mirror is a part of a hollow glass sphere silvered on one side.Solution 2:Solution 3: Focal length = 1/2 of radius of curvature = 1/2 x 30 = 15cm.Solution 4: Focal point is the principal focus of the mirror where a parallel beam of light meets(or appear … [Read more...] about Frank ICSE Solutions for Class 9 Physics – Light: Spherical Mirrors