Gilles wrote:Hey Guys!
I'm bad at calculating, but apparently some dude just found out mathematically that our universe may be a 5d black hole.
Maybe that's where our communication went wrong a year ago :wink:
Jinydu, you might want to restart your black hole calculations at the 5-d level, and maybe you'll understand that life is not only possible, but allso present in black holes
Toodels,
Ps, by the way, here's a nice link
http://www.newscientist.com/home.ns
AlienBilly wrote:it has an infinite mass and a volume of zero
bo198214 wrote:Thats nonsense. A black hole has only a mass big enough and radius small enough that the escape speed is superluminal. The escape speed is the speed a body needs to leave the orbit. Its computed by
v=sqrt(2 gamma M/r)
The so called Schwarzschild-radius is the radius for a given mass M such that the escape velocity at that radius is light speed. So we can get it simply from the above formula:
r=2 gamma M / c<sup>2</sup>
For example the Schwarzschild-radius of our sun is 2.95 km. That means if the sun becomes smaller than 2.95 km then its a black hole.
Its not so much a fact than the definition of a black hole.AlienBilly wrote:I will take that as a fact if you can explain this
The gravitaional pull can not exceed the speed of light, as it's a constant.
And as layed down here the escape velocity of light is naturally the speed of light.
For an object or particle to travel at or pull at the speed of light it would requier infine energy, how can an object without infinite mass have infinite energy ?
Wouldent that contradict the formula E=mc<sup>2</sup> ?
bo198214 wrote:The gravitational pull is a force not a velocity. But it is so strong that light and everything that is slower than light can not escape (below the given radius). In that sense it indeed exceeds the speed of light.
jinydu wrote:Light does not have infinite energy, even though it travels at the speed of light. This is because light has zero mass. And force and velocity are not the same thing; one is measured in Newtons and one is measured in meters per second.
AlienBilly wrote:...to make light unable to escape an object it needs a gravitational force that can deselerate light to 0
moonlord wrote:However, most scientists today agree that inside black holes there are singularities.
Return to Non-Spatial Dimensions
Users browsing this forum: No registered users and 3 guests