Question

define radius of curvature and focal length of a concave mirror

Answer 1

Answer:

The focal length (f) of a lens is the distance between the center of the lens and the point at which the reflected light, of a beam of light traveling parallel to the center line, meets the center line (principal axis). The radius of curvature (r) is the radius of the lens that forms a complete sphere.

Answer 2

Answer:

Radius of Curvature: The line joining the centre of curvature to the pole of the concave mirror is called radius of curvature of the concave mirror.

Focal length: The point where all the light rays which incident the surface of the concave meet mirror after being reflected is called the focal length of the concave mirror.

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