It is a practical application to solve problems of image size, distance of images, radius of curvature, focus, size and proximity of an object to the lens or mirror.
It has a simple to use interface in which three of the parameters are established and when the calculate button is touched, the other results are generated. As an extra point, you can see the procedure that a person performs when developing a physical optics problem, by simply clicking on the procedure button.
Solve Convergent and Divergent Lens Problems
Solve Concave and Convex Mirror Problems