Hi This is not a new experiment, but i've never seen it visualised that good and probably fit into this discussion: http://www.youtube.com/watch?v=Tt9Wvuo_Zn0 http://www.youtube.com/watch?v=wwPZlTYNefs http://www.youtube.com/watch?v=IzIKBArwaJM Thanks to Gerald Stegmiller for these videos -- Gruß,Frank