Prerequisites

1. Reflection of light at curved surfaces

·        Angle of incidence    =          Angle of reflection

<i         =          <r

·        Incident ray, reflected ray, normal at the point of incidence lie in same plane.

·        Sphere

·        Hallow sphere

-         Centre of hallow sphere

-         Radius of Hallow sphere

·        Circle

-         Radius

-         Tangent

·        Parallel lines