Lens and Mirror Equation Calculator
Solve thin-lens and spherical-mirror image distances with the real-is-positive Gaussian sign convention stated.
Optics result
Enter two distances
Real-is-positive Gaussian convention.
| Quantity | Value | Unit |
|---|
1 / f = 1 / do + 1 / di; m = -di / do
How?
How this is calculated
The solver uses the real-is-positive Gaussian convention. For mirrors it also reports the signed spherical radius as R = 2f.
Formula: 1 / f = 1 / do + 1 / di; m = -di / do
Sources
- OpenStax College Physics 2e, Image Formation by Lenses. OpenStax. Retrieved .
- OpenStax College Physics 2e, Image Formation by Mirrors. OpenStax. Retrieved .
Method last reviewed