My friend and I were having this discussion late one night recently. He said that theoretically faster than light travel is possible based on these two observations he heard others talking about.
I’m not sure about either of these experiments as my last physics class was AP Physics (which I got a 5 on, but I digress…) My friend has a PhD in Behavioral Psychology, so, not a physicist either, but I find him to be one of the smartest people I know.
Anyway, what is the SD on these experiments? Let’s assume that it’s physically possible to create these structures. The question is, does this prove the ability to move faster than light, or anything at all? (Please bear with me as it was really late when we were discussing this.)
- Construct a very, very long solid, uniform object, like a metal rod, but straightened out, and 186000 + 1***** miles long in space. ***** – +1 unit, like a foot or an inch or even a mile longer than distance traveled by light in a second.
Once constructed, push one end and measure the distance on the other end. Theoretically, since this is one uniform mass, the distance traveled is faster than light emitted from the source.
- Construct a tube full of marbles 186000 + 1 miles long. There is no gap between the marbles, and the tube is in a vacuum (like in space). Push the first marble such that the last marble at the end of the tube falls out.
In both cases, if one were to shoot a photon from the starting point (i.e. “the push”), the distance traveled in 1) and the marble falling in 2) should both be faster than the light, i.e. the movements in 1) and 2) are instantaneous.
Now, personally, I don’t believe in this. Practically speaking, there’s the obvious: it’s impossible to create such structures, there’s no amount of force to actually push these things and would collapse/destroy under its own mass (i.e. there would be a bend in the long piece of metal, or one of the marbles would implode thus stopping the transference of energy/information).
My friend did say that either there would be FtL would be practically proved, or there would be a very, very large explosion (infinite energy and all that).
Wouldn’t such structures have infinite mass as well?