Convex Mirror

As for the concave mirror, we still have the relation between radius of curvature and focal length, f = r/2. But now the center of curvature, C, and the focal point, F, are behind the mirror.

=> negative focal length, f < 0

Again we construct the image via ray tracing techniques.

The mirror equation still holds:

1/p + 1/q = 1/f

Since f < 0, we then get for convex mirrors:

f < q < 0

We thus always get a virtual and upright image from convex mirrors. The magnification is always smaller than 1.