Message No.3717 from nakayama , 13 February 2008 02:47:
 îòâåò íà No.3649: Proposal for New Michelson-Morley Experiment îò nakayama , 09 October 2007:
Allow me to add a changed (partially) view about "Prism Experiment".
Value of secular aberration is unknown. Then, true position of stars on the celestial sphere is unknown also. Coming direction of star light (visible to come from just above) is uncertain. There is no way to find true direction. However, this situation is not fatal to this thought experiment. Because, about phenomenon of the difference of the number of waves that enter both faces of prism, coming direction of star light is unrelated obviously (when the prism is at standstill against diagonal star light ray, the number of waves that reach optional two points on the both faces of prism is equal). Then, this experiment may disclose the direction of the motion against aether. But how about the speed ? I want entrust it to capable men (but if it's able to measure the wave length of star light directly, the speed of motion against aether may be disclosed by other experiment).