In this episode of the Ask Us Whatever Relativity series, host Joe Sorge shows that the GPS navigation system would fail if the atomic clocks aboard GPS satellites were synchronized with Einstein’s method. Such clocks must be adjusted to compensate for the relativistic effects of gravity and speed on time dilation, but they cannot be synchronized using Einstein synchronization. Joe walks us through the Sagnac Effect and the differences between Einstein clock synchronization and the absolute synchronization method relied upon by GPS systems and by coordinate universal time (UTC) atomic clocks. Joe makes clear that in the reference frame of the Earth, light speed is NOT constant if measured with atomic clocks that have been absolutely synchronized, and that Einstein synchronization creates the illusion of constant light speed in moving inertial reference frames; whereas absolute clock synchronization reveals this illusion. #Veritasium #PBSSpaceTime #QuantaMagazine #Einstein #SagnacEffect #LightSpeed If you enjoy the videos on this channel, please subscribe to Ask Us Whatever so you don't miss future episodes. You can revisit past episodes here or on our website. View this video with transcript on our website https://askuswhatever.com. You can also access a variety of references for the video here: https://askuswhatever.com/episodes/episode-7-3-gps-versus-einstein/#references

In episode 6.2, Joe Sorge guides us through the logic behind the Alternative Model to Special Relativity. Watch as he takes us on a journey from the garden to the studio to demonstrate why we don't need length contraction to explain observational data. If we eliminate length contraction from the Lorentz-Einstein model, it leads to the alternative explanation that light emitted from a moving source travels at faster speeds than c in the longitudinal direction, at speed c in the transverse direction, and somewhere in between when traveling at an angle, as observed from a stationary frame of reference. Subscribe to Ask Us Whatever so you don't miss future episodes in this thought provoking series. View this video with transcript on our website https://askuswhatever.com

In episode 4 of the special relativity series watch as Joe Sorge details the reasoning leading up to the famous 19th century experiment by scientists Michelson and Morley. You won’t want to miss this fascinating account of the experiment and why its results proved to be such a dilemma. One that is not fully resolved to this day. Length contraction has become the widely accepted solution to the dilemma and the one that Einstein incorporated in his special theory of relativity, but is it the correct solution? Subscribe to Ask Us Whatever so you don’t miss the next episode in this thought provoking series. View this video with transcript on our website https://askuswhatever.com

In Special Relativity episode 3 part 1, we explore something quite unusual -- time dilation. That is, clocks ticking at different rates. The faster you move, the slower your seconds become! Time dilation is very counter-intuitive but we will break it down so you can understand it... Join us in this episode to learn more! View this episode with transcript on our website https://askuswhatever.com.