Quote:
Originally Posted by UnderseaLcpl
Granted, I'm no expert on physics, but I disagree - at least until you can explain it.
The way it was explained to me is that objects travelling at relativistic speeds undergo corresponding shifts in mass (as gargamel states), as well as relative time and dimension. Even if you somehow had two particles of anything approaching each other at the speed of light, their speed, in any frame of reference, even when added together, is still c.
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It would be impossible for ordinary matter to travel at speeds greater than light speed, because the energy required to accelerate anything with mass to
c is infinite. However, there are (theoretical) particles that
always travel faster than light, and would similarly require an infinite amount of energy to slow down to light speed.