Demonstracion : Velocidad de la Luz es Variable !!
Allow me to write in English please.
Two stars glitter on the right and on the left. Facing stars, two mirrors are set at 45 degrees, and reflect star's lights down. Speed of two reflected lights are always the same. Therefore, when two mirrors move together to right or left, wave length(looked from stand point of mirror) of two reflected lights may be changed. In other words, wave density(number of waves that stays within certain same length of light path) of reflected light is changed by mirror's motion. But how about incident light ? Wave density does not be changed by mirror's motion ! n short, wave density(number of waves that stays within certain same length from mirror) of reflected light and incident light are generally not the same. Constant light speed isn't able to explain above, I think.
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P.S. I can't receive E-mail. I haven't PC.