This is Tom's world when the photon is at the cabin. You are already between the square flag and triangle flag.
Why don't we notice these differences in our daily life? In everyday's life the differences are very -even extremely- small because the relative speeds between trains and cars are too slow compared to lightspeed. In particle physics research (CERN f.ex.) where particles travel close to the speed of light the effects of Special Relativity become very important. And satellites transmitting information to your GPS would not work properly without a correction necessary to counter the effects of Special (and General) Relativity. Etc.
=> Go to ....
- Relativity for Dummies
- 4D Spacetime Block Universe
- Reciprocal time dilation
- Reciprocal length contraction
- Lengths do not 'appear' contracted!
- Measuring the contracted train
- Constant light speed
- Where is the bullet?
- Train experiment
- Slower and shorter - case study
- Minkowski vs Loedel
- Spacetime video
- Further reading