Notvacka wrote:Godfree wrote:"time has no arrow" in quantum mechanics ,,???
we are talking theory are we not ,,time has no arrow , in theory ,
in reality , time goes only one way...
That is only true on a larger scale. If you would run a film of an apple falling from a tree backwards, you could tell that it was backwards, because the apple would be falling up into the tree instead of down. But if you had a film of a sub-atomic event and ran that film backwards, there would be no similar way to tell it was backwards. That's what time having no arrow in quantum mechanics means.
Events on a human scale only make sense "forwards" in time (where cause precedes effect) while on a sub-atomic scale events make equal sense in either direction (you can't tell a cause from an effect).
I hope that explains it.

Yes and thank you for putting it in terms that those who havn't studied the subject can grasp , this isn't an old boys club for university geeks to talk in tongues , or geek speak , so to speak ,
I have a lot of difficulty with science terms ,
the terms themselves seem to be confused,
like space didn't exist before the bang , what did ,,???
science doesn't seem to have an answer to that one,
the bang supposedly is creating space as it goes ,,???
and time began ,,,???
just can't relate to the idea of a finite universe ,
so I automatically reject the bbt and all of this curved space time ,
until I can find an explanation that makes sense to me ,
I will continue to assume the bbt is a load of rubbish ,
so I seek knowledge of an infinite universe , both in time and size ,
Heres one that really gets me going ,
the red shift , by looking at images that in some cases are 13 billion years old ,
and mixing them with closer images , they can decide it's all expanding ,,???
time has moved on since those images were created ,
surely the only way we could determine such a thing ,
is if we could calculate where all the galaxies are NOW
a lot of those galaxies don't even exist anymore ,
and billions of new ones may be there with there images still on the way ,
In your opinion , how much is guess work and how much is solid ,
I get the feeling there is more presumption than fact ,
more about what they want to see , rather than what the facts support ,
first , man thought the universe revolved around him/us , the earth ,
I can't see we have moved on ,
isn't the bbt just another attempt to be the most important thing in the universe , that our little event was the creation of the universe ,
like we are the most important thing , we are the center of our universe ,
ego , we are small and insignificant compared to infinity ,
but that doesn't suit our ego , we are it ,,!!!
it all revolves around us ,,!!!
I say bullshit , time and space are infinite ,,
and there could be a multitude of other species out there living just as important lives as we do ,
if we ever discover life elsewhere ,
I wonder how that will effect our ego ,???