Wednesday, July 19, 2006

Lissajous sundial

Can mirrors, lenses (or other static devices?) accelerate the image of the sun or shadow of it across the sky? It would be neat for a "sundial" which focuses a point of light from the sun to trace a lissajous curve, quickly enough that you can watch it move.

A very tall sundial produces macroscopically visible motion.

No comments :