SR/InertialFrames v2.2.2
STUDY.Physics.SpecialRelativity/InertialFrames
Physics case studies: Special Relativity: Inertial Frames
https://github.com/jp-diegidio/STUDY.Physics.SpecialRelativity
This is an open project: collaboration is welcome.
Contains:
Bob and Alice pass by each other collinearly at a relative constant speed.
They reset their clocks to zero at the moment they are colocated.
The space-time diagrams make concrete the clock hypothesis, i.e. proper time as absolute time, recovering absolute time as the fundamental dynamic variable, and with it the relativistic symmetry of the frame perspectives.
The diagrams also show that, relative to any frame of reference, any particle moves into the future and in space at a speed that is faster than measured in that frame (i.e. in a plane of simultaneity) by exactly its Lorentz factor. And this already and essentially is time travel.
In particular, the 4-velocity of light in any frame of reference is (scalarly) infinite in all components, its magnitude being exactly the measured light speed times its Lorentz factor (see the formal analysis for details).
Changes v1.0.0-alpha -> v2.2.2: