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What would happen to a particle if we accelerated it to the speed of light? Will the particle fade or will it turn into energy? PS: I know we can't accelerate particles to the speed of light, but I'm just asking "what if?"
Answer 1:

As a particle approaches the speed of light, its momentum, mass, and energy all approach infinity. The reason why we can't accelerate something to the speed of light is because doing so would require an infinite amount of energy. Your particle would become infinitely massive.



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