Physics
Mirror Formula
Relate focal length, object distance and image distance for spherical mirrors.
1/f = 1/v + 1/u
Formula Explanation
This is the standard mirror formula under Cartesian sign convention.
Variables Explained
f = focal length; v = image distance; u = object distance.
Solved Example
u = -30 cm, f = -15 cm. Find v.
1/v = 1/f - 1/u = -1/15 + 1/30 = -1/30 → v = -30 cm.