define pole,principal axis 0f a sperical mirror
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Explanation:
Pole: The centre of a spherical mirror is called its pole.
Principal axis: The straight line passing through the centre of curvature and pole of a spherical mirror is called its principal axis.
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Answer:
The centre of a spherical mirror is called pole. It is denoted by p.
The straight line passing through centre of curvature and pole of a spherical is called principal axis
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