Question

Definition of-
●Pole
●Centre of Curvature
●Principle Axis
●Principle Focus

Class 10
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Answer 1

Answer:

pole :- The centre or midpoint of the reflecting curved surface of a spherical mirror is called pole.

Centre of curvature:- The centre of the imaginary sphere of which the spherical mirror is a part is called centre of curvature.

Principle focus:- It is a point on the principal axis where a beam of light parallel to the principal axis after reflection either actually meets or appears to meet is called principal focus.

Principal axis:- An imaginary line passing through the pole and centre of curvature of a spherical mirror is called pricipal axis.

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Answer 2

Answer:

Pole :- The centre of reflecting surface of a concave and convex mirror is called pole of the mirror..

Centre of curvature :-. It is a centre of the sphere from which the mirror is apart. It is represented by C. Centre of curvature of a concave mirror is infront of it and Centre of curvature of the convex mirror is behind it..

Principal axis :- The imaginary line which is passing through the centre of curvature and pole of the mirror is called principal axis..

Principal focus :- It is a point of principle axis where the beam of light parallel to the principal axis after the reflection either actually meets or appears to meet...

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