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Post by altomarelatios on Nov 25, 2009 5:53:53 GMT
Well, this was a question that I came across in my Physics book:
In Newton's Law of Universal Gravitation, time is not one of the variables, implying that this force acts instantaneously throughout space, faster than even light.
Is there anything wrong with this statement?
and while we're at it, we can discuss about things that are faster than light.
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Post by Admin on Nov 25, 2009 6:24:12 GMT
TIme is not a variable in the Universal law of Gravitation:
g = (GMm)/(r^2)
that is correct but... force has nothing to do with speed except the escape velocity:
v = Root[2GM/r]
meaning that if G is infinity, which it is in a black hole, supposing, no speed can surpass it - not even Light.
I must STRONGLY state this point: Nothing can go faster than or even equal (except light itself) to the speed of light.
As matter approaches the speed of light, because of the effects of space-time warping, Length dilation occur, Time-Contraction and Mass increase.
i.e. The faster you go, the heavier you get exponentially. (so if you run really fast, e.g. 5m/s, you're still gonna see no effects) and because you get heavier, you use more energy to move ^^
The faster you go, the longer you get.
The faster you go, the slower time is relative to outside observers.
[there is one thing that can go faster than light ^^ ArkAngel will discuss it]
---------------------------------------
I will get ArkAngel to post here.
[EDIT: ArkAngel just said the field of Gravity does in fact move at the speed of light]
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Post by Kyonko on Nov 25, 2009 21:45:45 GMT
Time/Space/Gravity are the three primary forces in our current understanding of the quantum mechanics of the universe. Time is a encompasing relativistic thing, as pointed out in above post. There is a 'Time Compression' effect that can occur at exponential velocities. I'm not one for the mathmatics as I stink at math, but the theories and fundemental points I'm good at. Anyways, if we can view time and space as the double helix of DNA and gravity as the alliels that connect DNA one can theorize that the universe it's self is a body. This is a whole different conjecture, but somewhat relivent none the less.
Gravity how ever does NOT move at the speed of light, gravity moves on a linear quantum level. It's not regulated by either time and space, it's uniform speed may be similarly equivilant to the speed of light but by saying it moves at the speed of light is a false statement. The speed of light can be interfered and slowed down by gravity, while gravity can not be slowed down.
On an interesting note is that gravity can form dilations of time and space, crossing dimensional boundaries. As such warp travel is theoretically possible to enable faster than light travel, but the ammount of energy required to create, maintain, and stabalize a gravity bubble around not only the vessel but around the open and exit of the worm hole would require incredible ammounts of energy. It would be trillions of times the ammount of energy our sun can put out in it's whole life time.
But that in of it's self points out something, is warp really faster than light? I don't believe it is, since you'd be meerly sidestepping time and space temporially.
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Post by Admin on Nov 26, 2009 23:39:04 GMT
The gravitational field does move at the speed of light.
Suppose I teleport a huge mass in the middle of space. The gravity exerted by the mass moves at the speed of light. So basically if I was one light-year away from that mass, in one year, that gravity would affect me.
Now, a common way to see this effect is the Mattress-Ball view.
If I drop a ball onto the mattress, the bending of the mattress will be at the speed of light (not in real life, obviously but just supposing the bend is gravity).
Anyways it is impossible for anything with mass to move the speed of light or faster. Yeah, photons don't have mass - due to the theory of wave-particle duality. The force of gravity moves the speed of light, as force cannot have mass.
(anyways ArkAngel should post here maybe tomorrow?)
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Post by altomarelatios on Dec 5, 2009 0:00:35 GMT
ok..... kinda get it now... ty
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Post by some1hackme on Feb 17, 2010 1:24:37 GMT
I've read that thoughts are faster than light one time in a Physics book.
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Sieg
Mime
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Posts: 68
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Post by Sieg on Apr 7, 2010 23:52:40 GMT
OH DAMN! Are you people pasting this from Google-or are you just incredibly smart?
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Post by Morph on Oct 7, 2011 16:54:43 GMT
OH DAMN! Are you people pasting this from Google-or are you just incredibly smart? Believe me, they are incredibly intelligent people... Just their speech show this. |
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Post by hockey678 on Dec 15, 2014 23:10:56 GMT
actually the removal of light is faster that light, if I had a 100 million watt bulb, lighted it then aimed it at a far away planet then put my hand in front of the light once it reached the planet (would take a while) the shadow of my hand would appear instantly
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