The distance of principle focus from optic center is called focal length of a concave lens.
Approved
Last Activity: 10 Years ago
venky
A spherical mirror is a mirror which has the shape of a piece cut out of a sphericalsurface. There are two types of spherical mirrors: concave, and convex.
Last Activity: 10 Years ago
PRAPULPODISHETTI
A mirror which is a part of a sphere is called Spherical Mirror.
Last Activity: 10 Years ago
E.Nandhini ketha
A spherical mirror is simply a piece cut out of a reflective sphere. Spherical mirror is of two types concave mirro and convex mirror.
Last Activity: 8 Years ago
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