Speed of light and dark matter

In summary, the speed of light is considered the universal speed limit because it is impossible to accelerate any object to that speed without an infinite amount of energy, due to the massless nature of light. This restriction applies to all matter, including dark matter. The concept of synchronized clocks is only lost at relativistic speeds, and for objects moving at the speed of light, time and distance are relative. Therefore, it is impossible to measure speeds greater than the speed of light.
  • #71
ghwellsjr said:
How does that help measure the speed of a particle going faster than light?

not like that.. I said we can identify whether particles are moving faster than light if we see that radiation...
 

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