Question

define the following terms in the context of spherical mirror - 1) pole 2) centre of curvature 3) principle focus

Answer 1

pole can be defined as the point where principal axis meets the lens.
centre of curvature is the geometrical centre of the sphere of which the spherical mirror is part of.
principal focus is the point on principal Axis where all the rays parallel to principal axis meet after refraction.

Answer 2

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●Centre of curvature is the centre of the sphere of which the spherical mirror is a part.

●Principal focus is the point on the principal axis, where a beam of light, parallel to the principal axis, after reflection, either actually meets (concave) or appears to meet (convex)

●Pole is the mid point of spherical mirror.

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