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SAI INTERNATIONAL SCHOOL
                                                       Class 7
                                                   Lesson Notes
                                                 Subject-Physics
                                   CH: Light and Associated Phenomena
                                          Subtopic- Spherical Mirrors
     Spherical Mirror
             The mirrors which have curved reflecting surface are called spherical mirrors.
             These are two types
                   1. Convex mirror
                   2. Concave mirror
     Terms related to spherical mirror
     Principal Focus
                 When a parallel beam of light is incident on a spherical mirror, they converge to a point or
                    appears to diverge from a point after reflection.
                 This point is called Principal focus.
     Centre of Curvature
             It is the centre of the sphere of which the spherical mirror is a part.
     Principal Axis
             It is the line passing through the centre of curvature of sphere of which mirror is a part and the
     centre of mirrors.
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