Why is there a universal speed limit, c, and why is it what it is?

In summary: P2 - "The physical quantities that denote the state of physical matter and the motion of physical bodies are the same in all inertial frames of reference."P3 - "The laws of physics are the same in all inertial frames of reference."P4 - "The speed of light in a vacuum is the same in all inertial frames of reference."P5 - "The laws of physics are the same in all inertial frames of reference."When people ask why the speed of light is the same in all inertial frames of reference, they're usually asking for a
  • #211
bobc2 said:
sahil_time, why is that not possible?

Because doing so may change the whole concept of Forces!Like if C was different for different observers then epsilon/permeability would be different and hence the electric field and magnetic pheneomenon would be different for different observers!Like Electric field at a point could have infinite possible values!
Well that's what i think!
 

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