Question

Explain the principal focus of mirrors.

Answer 1

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✴️Here is your answer ✴️

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Principal focus is different of two mirrors-

✍️A concave mirror has a real focus.

The principal focus of a concave mirror is a point on its principal axis at which all the light rays which are parallel and close to the axis,converge after reflection from Concave mirror.So, it is known as converging mirror.

✍️A convex mirror has a virtual focus.

The principal focus of a convex mirror is a point on its principal axis from which a beam of light rays, initially parallel to the axis, appears to diverge after being reflected from the convex mirror.So, a convex mirror is a diverging mirror.

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Answer 2

Incident ray which are parallel to the principle axis of concave mirror after reflection from the mirror meet at a particular point in front of the mirror principle axis this point is called principal axis