Question

① Define principal focus and focal length of
spherical mirror
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Answer 1

Answer:

Principle focus is the the line passing through the focus and centre of curvature to the pole of the mirror,and the focal length is the distance between the focus and the pole of the mirror.

Explanation:

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Answer 2

Answer:

Principle focus is the the line passing through the focus and centre of curvature to the pole of the mirror,and the focal length is the distance between the focus and the pole of the mirror.

Explanation:

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