Longitudinal light clock vs special relativity
arXiv:1103.0445
Abstract
In order to respect the Principle of Relativity, the analysis of the behavior of the longitudinal light clock reveals the necessity to extend the Doppler effect also to space and time. As a consequence, the bodies in inertial motion must dilate along the direction of their movement.
8 pages, 3 figure, revised version in all sections and figures