Educator

Spherical Mirror

• Spherical mirror: A piece of a glass sphere.
• If the inner side is polished, then the spherical mirror is a concave mirror. If the outer surface is polished, it is a convex mirror.
• The focal length of a spherical mirror is equal to R/2, where R is the radius of the sphere from which the mirror is taken (the radius of curvature).
• The straight line from the center of the sphere to the mid point of the mirror is called the principal axis.
• The mail mirror equation: 1/f = 1/p + 1/q.