According to the new Cartesian sign convention, the _______ of a curved mirror is taken at origin.

Centre of curvature

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Pole of the mirror

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Focus

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Midpoint of focus and pole

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Solution

The correct option is A Pole of the mirror
In the case of mirrors, the pole(optic center) is the origin to measure object and image distances.
Distances that are measured in the direction of the incident rays are positive while distances measured in the direction opposite to the incident rays are taken to be negative.

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