Message 3675 from nakayama, 20 November 2007 02:48:
In response to message 3649: Proposal for New Michelson-Morley Experiment from nakayama , 09 October 2007:
From just above, a ray of light (fine laser beam) is coming. The prism traverses this vertical line. Number of waves that enter both slopes of the prism may not be equal.