Science, asked by kashu0909, 11 months ago

What is principal focus in brief?​

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Answered by Anonymous
5

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Principal focus

Focus is the point where light rays originating from a point on the object converge. The principal focus is defined as the point where a beam parallel to the principal axis appears to diverge converges from a point on the principal axis after passing through the lens.

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Answered by Anonymous
2

principle focus

A number of rays which falls parallel to the principal axis on a concave mirror meets at a point on the principal axis after getting reflected. This is known as the principal focus of a concave mirror.

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