Strobe of a falling ball HTML5

A tennis ball is thrown up in the air. A stroboscope illuminates the ball at uniform time intervals when you select "stroboscope". You have a cursor to calculate each position and you just need to rollover the balls to display the photographic shooting time.

Click on {print} to print the current page.

Click on 'cursor' to make some measurements.

Rollover each picture to display its photographic shooting time.