Markus Häring

The great circle (orthodrome) is behind the shortest distance between two points on the surface of our planet.In the common display of the world, the …

Records, saves and analyses all your trips you are interested in.This app has been made for people on the way.All between walking and flying :-)check …

Shows a light ray within a birifringent crystal and reflection and transmission at the surface towards air.Answers questions like:* Is the angle of re …