Question

formula for the spherical mirror

Answer 1

Spherical mirror Formula

This equation predicts the formation and position of both real and virtual images in thin spherical lenses. It is valid only for paraxial rays, rays close to the optic axis, and does not apply to thick lenses. Also, it can be determined the curvature ratio of the lens.

1/(object distance) + 1/(image distance) = 1/(focal length)

Focal length ≈ curvature radius / 2

The equations are:

1/o + 1/I = 1/f

F ≈ r/2

Where:

o: Object distance

I: Formed image distance

f: focal length

r: Curvature radius

Answer 2

For spherical mirrors,

1/v + 1/u = 1/f

where 'u' is object distance 'v' is image distance and 'f' is focal length.