Question

1] What is meant by "Principal Focus" on a mirror
2] What is meant by the "Focal Length" of a mirror

Answer 1

Explanation:

Hint : The principal focus of a concave mirror is the point where a ray of light parallel to the principal axis will converge to the focal point. The focal length is the distance between the pole of the mirror and the focal point of the mirror.folow me

Answer 2

Answer:

1.The principal focus of a spherical mirror is a point on the principal axis of the spherical mirror at which, the light rays which are parallel to the principal axis essentially converge (meet) or emerge to deviate after reflection. ... That point is what's called the focal point (or the principal focus).

2.Focal length of the spherical mirror is the distance from the pole of the mirror to the focus point of the object. The radius of the curvature of the mirror is determined by the two formulas, one is magnification formula and other is focal length formula.

Explanation:

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