Question

Define the principal focus of a concave mirror ​

Answer 1

Answer:

The principal focus of the concave mirror is an point on the principal axis of the mirror, where incident rays of light, parallel to the principal axis, after reflection from mirror surface, intersect each other .

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Answer 2

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❥Focus the point on the axis of a lens or mirror to which parallel rays of light converge or from which they appear to diverge after refraction or reflection.

❥ A central point of attention or interest.