01 / The lessons
Follow the change.
Then look at the model.
BEGIN WITH SOMETHING YOU CAN SEE.
Stay with one wave as it reaches shore, or follow light until it reaches an observer. The controls let you change the conditions along the way. Each lesson shows the mathematics it uses and where that model stops being useful.
- Wave lesson
Analytic offshore · Computed from the seam
The Wave
A wave changes as the water gets shallower. Follow it from deep water to the sand, then change its height, the depth, or the beach slope and compare what happens.
- Light lesson
Schematic optical score · Not a physics solver
Light
Follow light from a source to an observer. Change the medium or surface and watch its path change on the way to an image.