Having loads of fun here <my email truncated the interesting and relevant parts of the previuos messages, so no quote possible>
Horace, your gedanken experiment involving the dropped rock neglects the fact that light carries momentum. In order for the rock to be turned into light ttraveling the opposite direction, a force must be applied to reverse its momentum. Equally, Einstein at the top of the ladder must apply a force when he catches the light to stop it and turn it into a stationary rock. Merlyn Magickal Engineer and Technical Metaphysicist __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
