October 19, 2004 9:15 AM Subscribe
A shadow can go faster than light, but apparantly this does not break any physical laws as a shadow cannot communicate information. What happens if I tell someone that I will make a large shadow on the moon, visible from Earth, and that if the shadow does not move, then they should phone me. However, if it does move (at a speed faster than light), they shouldn't phone me. Hasn't information been transmitted?