Mirror Focal Point Calculator
Mirror Focal Point
Calculate the focal point of a concave mirror.
Formula
f = R / 2; 1/f = 1/do + 1/di
Frequently Asked Questions
How is focal length related to radius of curvature?
The focal length is exactly half the radius of curvature.
When does a concave mirror form a virtual image?
When the object is between the focal point and the mirror surface.