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Thread: Special Relativity

  1. #1 Special Relativity 
    Junior Member
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    Hi guys, I have a few questions too do with special relativity and time dilation. when using the time dilation equation can the the units of v and c be fractional or percentages. so you can refer too v as 0.99 or just 99 with 1 or 100 being the absolute speed of light? and also i was wondering for a simple explanation of why objects with mass cannot reach the speed of light due to special relativity.

    Many Thanks
    Dan
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  2. #2  
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    v and c have the same units. You can use whatever you want, since the ratio is what counts.
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  3. #3  
    Administrator Markus Hanke's Avatar
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    and also i was wondering for a simple explanation of why objects with mass cannot reach the speed of light due to special relativity.
    The basic idea is that, the faster you go ( relativistic speeds ), the more energy is needed to accelerate further. In other words - the faster you go the harder it gets to go even faster. As you approach the speed of light, the energy needed increases exponentially and without bounds - you would need an infinite amount of energy to accelerate anything to the speed of light.
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