Neddy, unfortunately I have to stop posting for the next few months but your ability to recognize words and post articles that also contain those words doesn't replace understanding what those words mean and how they apply to a specific reasonable discussion. The vertical mirror plates are initially separated by a unit distance in my Md yet I'm seeing that separation, perpendicular to the direction of motion, is subject to perspective once they start moving. No matter what the velocity, the Loedel perspective will always see a unit separation between the plates. In this particular example of .6c, Bob's stationary perspective will see length contraction between the moving plates by a factor of 1/Y and Alice's moving perspective of Bob's stationary clock will see his unit length separation between his plates actually expand by a factor of Y. Now since you can't do pertinent searches on the word "Loedel", you can't reasonably discuss this question as it's far too deep for your brainwashed, superficial parrot mind. I need someone who understands how perspective works, apply a half speed perspective to my example and explain why my result shows both length contraction and expansion seems to be happening to the separation of plates travelling perpendicular to the direction of motion. Janus could give me a specific answer to my specific question because his knobs go to eleven. Now I don't really need a Wiki article from you on how plates are made and have your parrot friends agree in unison on how that's indeed an answer to my question. See y'all in a few months.