Quote:
Originally Posted by Morepower
Personally I wouldn't be surprised to see the Big Bang Theory debunked in the near future. It seems scientists are clutching at straws. They say at an early point during the Big Bang it had to expand faster than the speed of light (expansion ?), just like that ! Even though for many years it was said nothing could exceed the speed of light, especially considering the amount of energy required to move matter near to the speed of light, let alone faster. And yet we still say nothing can go faster than light. And now again they say we have reached the limits of what we can see due to the fact that everything after a certain point is travelling faster than light.
|
Hello Craig,
There is nothing contradictory about this.
An object
moving in space-time cannot exceed the speed of light for the reasons you have given. Space-time expansion however can exceed the speed of light. It's important to realize that as space-time expands, objects in space-time
do not change their spatial positions unless they are gravitationally influenced by other objects.
If the Universe in its very early history didn't expand faster than the speed of light then the Universe would violate causality (horizon problem).
Quote:
|
Not to mention when things don't seem to fit the model of the Big Bang they just keep adding Dimensions, first ~9, then 11, and now 20+ ?
|
String theory uses Pure Mathematics, it is not a physical theory. The 10 or 26 dimensions has no relevance to physical cosmology.
Cosmologists are perfectly happy with their 4 dimensions.
There is also considerable debate in the physics community if String Theory is a scientific theory which is falsifiable or nothing more than an exercise in Philosophy which can neither be proven nor disproven.
Regards
Steven