|MadSci Network: Physics|
Say there is point A on the ground and 5 m (meters) above it is a ball which I will call B. There is a light source at an obtuse angle with B, producing a shadow which I will call S. B is 5 m above A, which is on the ground. The shadow will be on the ground, because the light source is above B. Anyway, the distance between S and A, put as SA, is greater than the distance between B and A, put as BA. So, SA > BA. B is 5 m off the ground, so S could be 6 m or 7 m away from A on the ground. Now, if I throw the ball down at A, the shadow will also move towards A. Say, S is 7 m away from A. When B meets A, then S must also meet A. Since they go to A in the same time, and S has to go a further distance, S would go faster than B. I say it took B 2 seconds to hit A. B went at a speed of 5 m/2 s, whereas S went at a speed of 7 m/2 s. S goes faster than B. What then, if B was going at 99.9999999% the speed of light? S would be faster than light. Does this mean a shadow goes faster than light, or it can?
Re: Can a shadow go faster than light?
Try the links in the MadSci Library for more information on Physics.