Question

establish the relation between the focal length and radius of curvature of a spherical mirror. Define principle focus of a concave mirror
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Answer 1

Answer:

good qestion ans is given below

Explanation:

1.the relation between focal length and radius of curvature in a spherical mirror is r = 2f

2. 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.

Answer 2

The distance between the pole P of the concave mirror and the focus F is the focal length of the concave mirror. Thus, the focal length of a concave mirror can be estimated by obtaining a 'Real image' of a distant object at its focus, as shown in the figure.