User talk:2601:1C0:C602:9F3C:D80F:7059:5DA9:6B34

I believe there may be a problem with example 2, the rotating disk. This problem has been deeply contentious since the early days of relativity. The basic problem is that, the analysis which leads to time dilation for an observer located on the rotating edge, is essentially based on the idea that the speed of light will be c for all observers, including him. However, the Sagnac effect, which is well-established and is fundamental to the operation of electronic gyroscopes used in satellites, shows that this is not true.

For an in-depth discussion of this matter see New Perspectives on the Relativistically Rotating Disk and Non-time-orthogonal Reference Frames

http://arxiv.org/abs/gr-qc/0103076

Exfalcidor (talk) 16:44, 24 October 2015 (UTC)