Question

Define the following terms related to spherical
mirrors! a) Pole b)centre of curvature c)principal axis d) focal length​

Answer 1

Answer:

central of curvation, principal axis

Answer 2

Explanation:

(i) (a) Pole : Centre of the reflecting surface of the mirror.

(b) Centre of curvature : The centre of the hollow sphere of which the reflecting surface of mirror is a part.

(c) Principal axis : Straight-line passing through the pole and the centre of curvature of a spherical mirror.

(d) Principal focus : Incident rays parallel to principal axis, after reflection, either converge to or appear to diverge from a fixed point on the principal axis called principal focus of the spherical mirror.

(e) Focal length - The focal length of an optical system is a measure of how strongly the system converges or diverges light; it is the inverse of the system's optical power. A positive focal length indicates that a system converges light, while a negative focal length indicates that the system diverges light.

I hope you are able to understand my points...

I hope you are able to understand my points...in physics it is must to understand because the topic which you are studying is also important..