State the relationship between object distance, image distance, and focal length of a spherical mirror.
Object distance: It is the distance between the object placed and the incidence point.
Image distance: It is the distance to the center line of the lens of an image.
Focal length: It is the one-half of mirror radius of curvature.
The formula of focal length:
Hence, the relationship between object distance, image distance, and focal length of a spherical mirror is .