Is Gravity Actually Leaking from Another Universe?

[Kt_Atis]

Today after watching a show called "Parallel Universe" and they talked about Parallel Universes of course. But the interesting thing is that they said that gravity is weak. For example. Like how the whole Earth pulls on you and yet you are able to pick things up in a heartbeat with no problem at all. So they later come to the conclusion that gravity is leaking from our universe into an 11th deminsion. This is called M-Theory. Later they say that what if gravity wasn't leaking from our universe but to it. What if it came from that other universe inwhich the gravity would be as strong as the other forces but by the time it reached us it would only be a faint signal.

So my question is how likely is this scenerio.

 

[rbj]

Today after watching a show called "Parallel Universe" and they talked about Parallel Universes of course. But the interesting thing is that they said that gravity is weak. For example. Like how the whole Earth pulls on you and yet you are able to pick things up in a heartbeat with no problem at all. So they later come to the conclusion that gravity is leaking from our universe into an 11th deminsion. This is called M-Theory. Later they say that what if gravity wasn't leaking from our universe but to it. What if it came from that other universe inwhich the gravity would be as strong as the other forces but by the time it reached us it would only be a faint signal.

So my question is how likely is this scenerio.

the thing that bothers me about the concept of the weakness of gravity is that when you get to specifics, it isn't only a comparison of the force of gravity to the forces of other fundamental interactions, say electromagnetic, but there are other quantities involved like the amounts of mass and charge. and these quantities are not commensurable ("comparing apples to oranges"), so since the force of gravity depends on how much mass you have and the force of E&M depends on how much charge you have, who says that gravity as a class of interaction is weaker than EM as an interaction? we can come up with a mass-to-charge ratio where the forces would be equal.

$$\sqrt{ \frac{1}{G 4 \pi \epsilon_0} } = \frac{m_P }{q_P}$$

with a mass/charge ratio of that, the strength of gravity is the same as the strength of EM. but elementary particles have a much less mass/charge ratio than that. so that is why, for charged elementary particles, the gravitational interaction seems to be insignificant - because the charge on the protons is approximately the Planck unit of charge but the mass of the protons is far, far less than the Planck mass.

i like how Frank Wilczek puts it:

...We see that the question [posed] is not, "Why is gravity so feeble?" but rather, "Why is the proton's mass so small?" For in Natural (Planck) Units, the strength of gravity simply is what it is, a primary quantity, while the proton's mass is the tiny number [1/(13 quintillion)]...

http://www.physicstoday.org/pt/vol-54/iss-6/p12.html June 2001 Physics Today

 

[sir-pinski]

The idea that gravity could be leaking from another universe is a fascinating concept, and it is something that has been explored in theoretical physics for many years. M-Theory, which is a branch of string theory, suggests that there could be multiple universes existing in parallel to our own. In this theory, gravity is one of the fundamental forces that can travel between these universes, potentially explaining why it appears to be weaker in our universe compared to the other three forces (electromagnetism, strong nuclear force, and weak nuclear force).

However, there is currently no concrete evidence to support this theory, and it remains a purely theoretical concept. While it is an intriguing idea, it is important to note that M-Theory is still a work in progress and has not yet been fully developed or tested. Therefore, it is difficult to say how likely this scenario is without further evidence or experimentation.

That being said, the concept of gravity being a force that can travel between universes is not entirely implausible. In fact, there are other theories that suggest similar ideas, such as the concept of "brane worlds" where gravity can leak between parallel universes through higher-dimensional spaces.

In conclusion, while the idea of gravity leaking from another universe is an interesting one, it is currently just a theory and has not been proven. Further research and experimentation will be needed to determine the validity of this concept.