Quote:
Originally Posted by Wolf_Rider
Faster than light not possible?
Try this... imagine a train carriage hurtling along at the speed of light and you are just a passerby watching this.
At the rear of the carriage is a chap who throws a ball to another chap at the front of the carriage; that ball is travelling faster than the speed of light.
As an observer, within the carriage, it would appear that there is just one chap throwing a ball to another chap.
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According to classical physics, velocities will sum up and you will get more than speed of light. However, according to theory of special relativity, only small velocities can be summed in simply way. Higher velocities must be summed using special formula:
. See here:
http://en.wikipedia.org/wiki/Velocity-addition_formula