17 Nov 09
Originally posted by FabianFnasPerhaps I was unclear at (at lest) one place:
"So red-shifting alone doesn't prove the expanding universe theory--right?"
Wrong. Yes it does.
There are two movements among the galaxies. (1) A random movement, and (2) a "movement" due to universe expanding. The further away the more (2) take place in relation to (1). So other galaxy clusters are moving away from us, but within the galaxy clusters ...[text shortened]... ost important reasons that we believe that the universe is expanding in the BigBang theory.
"but within the galaxy clusters the random movement is most important in relation to us."
should rather be
"but within our galaxy cluster the random movement is most important in relation to us."
21 Nov 09
Originally posted by FabianFnasOKay---that makes sense. I hadn't thought about random movement, and with the universe being entropy (as the brilliant physiscist/comedian Robin Williams pointed out 😀 ) I should have realized that.
Perhaps I was unclear at (at lest) one place:
"but within [b]the galaxy clusters the random movement is most important in relation to us."
should rather be
"but within our galaxy cluster the random movement is most important in relation to us."[/b]
21 Nov 09
Entanglement just means that some certain property of a particle is related to the same property in another particle, for example you can prepare a system in such a way that if the spin in one particle is "up", the other one immediately goes "down". This is what's used in quantum teleportation, but it turns out that it does not allow any information to be transmitted faster than light. The subtlety is that if you have some observer A 100 miles from observer B, and A measures an entangled particle to be spin up, observer B cannot "do" anything with that measurement unless he knows the outcome of the measurement of A, which would need for example a telephone link.
25 Nov 09
Originally posted by karoly aczelActually, the speed of thought is about 200 feet per second. (speed of neuron data flow)
Whats faster than the speed of light? The speed of thought , for one😉
You might be thinking of the idea we can think about Andromeda galaxy one second and think about getting a Gelati at Rita's the next, which you might translate into doing a couple of million light years per second but that is not exactly velocity, is it?
26 Nov 09
Originally posted by sonhouseMy dad often uses that as an argument asking, "How long does it take to think of the sun?". That being proof that thought travels faster than light. He doesn't seem to understand when I explain to him that your thought isn't actually travelling there. 😛
Actually, the speed of thought is about 200 feet per second. (speed of neuron data flow)
You might be thinking of the idea we can think about Andromeda galaxy one second and think about getting a Gelati at Rita's the next, which you might translate into doing a couple of million light years per second but that is not exactly velocity, is it?
26 Nov 09
Originally posted by lauseyI bet he can break conservation of mass-energy with his imagination too!
My dad often uses that as an argument asking, "How long does it take to think of the sun?". That being proof that thought travels faster than light. He doesn't seem to understand when I explain to him that your thought isn't actually travelling there. 😛
