Question

Define principal focus of a concave mirror​

Answer 1

Hey mate ,

Principle focus or focus( denoted by f) of a concave mirror is the point where the light Ray's parallel to principle axis meet after reflection .

Also It is half the centre of curvature .

C = 2f

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Answer 2

Answer:

hey mate:-

Explanation:

The principle focus of concave mirror is a point on its principle axis to which all the light rays which are parallel and close to the axis, converge after reflection from the mirror.

Uses of convex mirrors:

1) Convex mirrors are used in rear view mirror in vehicles because the mirror can diverge a beam of light and create a virtual image.

2) Convex mirrors are used as reflectors in street lamps to diverge light over a larger area.

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