Question

with the help of a suitable diagram explain the meaning of the following terms for a concave mirror (a) centre of curvature (b) optical centre (c) principal Axis (d) focus

Answer 1

focus
a point on which all rays meet after reflection
opticle center
middle point of lens
principal axis
line perpendicular to opticle center
centre of curvature
it is the center from which mirror is a part of

Answer 2

Answer:

Center of curveture - it is the centres, of the spheres of which the two surface of the given lens, are a part.

Optical centre - the special point, on the principal axis of a lens, through which light passes without undergoing any 'bending', or 'deviation'.

Focus - the distance between the optical centre and principal focus of the lens.