In concave mirror, centre of curvature is in front of it but in convex mirror it is behind the mirror. Pole: The centre point on the spherical mirror is called pole.

Let us find out what are mirror and lenses, phenomena’s associated with them, applications, convex lens, concave lens, convex mirror, concave mirror in the form of MCQs.

We prepared concave silicon-crystal lenses or mirrors with focal distances of 30, 40, 50 and 100 mm. A concave silicon crystal lens or mirror can be prepared using a (111) wafer ().A perfectly ...