Question

Between focus and centre of curvature

Answer 1

Answer:

Question is incomplete but I think you want to know the difference between center of curvature and focus.

Focus:

• when rays come parralel to principle axis the pass through a point called focus.
• It is denoted by f.

Center of curvature

• The center of the circle of which the spherical mirror is a part is known as center of the curvature.
• It is dented by c.

Relation between c and f.

C=2f

Answer 2

Answer:

the difference is focus is the point on the principal axis ,where a beam of light, parallel to the principal axis,after reflection, either actually meet(concave), or appears to meet(convex).certre of curvature is the centre of the sphere of which the spherical mirror is a part