Old simulations
These simulations were made using the Adobe Flash/AcrtionScript. You can download them and run then in Windows.
slow apparent motion
Stroboscope Simulation
This is a new simulation of a rotating disk being illuminated by a stroboscope. You can control the speed of the disk and the frequency of the stroboscope, and see how the white spot on the disk appears. You can check all the cases of stationary appearance and the slow-motion appearance.