Parabolic Solar Cooker

Explore the relationship between f-number of a parabolic solar cooker and its sensitivity to change in angle of incoming light  

Tags: parabola, solar-cooker, reflection

Pool reflections

We look at the path of a pool ball as it bounces off 3 cushions

Tags: reflection, transformation

Coffee Cup Caustic

You can move the light source and observe the changes in the reflected rays which form the caustic.

Tags: caustic, envelope, reflection, circle