Question

Define the principal focus of a concave mirror.​

Answer 1

here is your answer mate

Light rays that are parallel to the principal axis of a concave mirror converge at a specific point on its principal axis after reflecting from the mirror. This point is known as the principal focus of the concave mirror.

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Answer 2

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the principal axis of a concave mirror converge at a specific point on its principal axis after reflecting from the mirror.