What is principal axis?

Straight line passing through Centre of curvature and pole

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Straight line passing through Centre of curvature and any point on the mirror

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A line passing through focus and any point on the mirror

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None of the above

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Solution

The correct option is A
Straight line passing through Centre of curvature and pole

It is a straight line which passes through the centre ,focus and pole of the mirror.

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Similar questions

A straight line passing through the geometric centre of the spherical mirror and the focus is called the ____________ of the mirror.

For an incident ray directed towards centre of curvature of a spherical mirror, the reflected ray :

(a) retraces its path

(b) passes through the focus

(d) becomes parallel to the principal axis.

The imaginary line passing through the pole and the center of curvature of the curved mirror is called its _______.

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