with the help of suitable diagram, explain the meaning of term:
(a) centre of curvature
(b)optical centre
(c) focus
Explain step by step
Answers
Answer:
Answer: The diagram shows a convex lens. ( a ) Centre of curvature - center of curvature of a curve is found at a point that is at a distance from the curve equal to the radius of curvature lying on the normal vector. It is the point at infinity if the curvature is zero.28-Nov-2019
A. Centre of curvature:
A lens is gerenally made up of 2 curved surfaces . These curved surfaces are parts of sphere. Centres of these spheres are called the centre of Curvature. Here, Cl and C2 are the centres of curvatures.
B. Optical Centre:
The Centre inside the lens is called optical centre. A ray of light passing through the optical centre emerged without deviation.
C. Focus:
When rays of light parallel to the principal.
axis. They converge at a point in a case of
convex lens. In case of a concave lens,
these rays appear to driverge at a point.
This point is called the focus of the lens.
