define the term pole ,axis and centre of curvature
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Pole of a mirror is the geometrical center of the spherical surface of the mirror. Principal axis is the straight line that joins the pole of the mirror to its center of curvature. Center of curvature with reference to a spherical mirror is the center of the sphere of which the mirror is part of.
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Pole of a mirror is the geometrical center of the spherical surface of the mirror.
Principal axis is the straight line that joins the pole of the mirror to its center of curvature.
Center of curvature with reference to a spherical mirror is the center of the sphere of which the mirror is part of.
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