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Question

According to the new cartesian sign convention, which of the following is taken as origin?


A

Focus

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B

Centre of curvature

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C

Pole of the mirror

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D

Any point on the principal axis

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Solution

The correct option is C

Pole of the mirror


As per the new cartesian sign convention, the pole of the mirror is taken as the origin.

All the measurements of object distance, image distance, and focal length are recorded from the pole of the mirror. All measurements are positive in the direction of incident rays and its opposite measurements are taken as negative.

Hence, The correct answer is Option C.


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