Unifying Gravity: How Physicists Concluded 10-35m Unification

[kent davidge]

How do physicists know that at 10^-35m gravitation becomes unified with the other three interactions. How they came to their conclusion?

Please note it's not a homework question.

 

[Vanadium 50]

Nobody knows this. It's a possibility to be considered.

 

[sophiecentaur]

Nobody knows this. It's a possibility to be considered.

As far as I understand things, String Theory has an approach that involves very small scale 'extra dimensions' and that seems to achieve unification. But there's no experimental evidence for this so it's a more a matter of what takes your fancy. The human mind loves to see loose ends tied up and String Theory does just that.

 

[kent davidge]

Nobody knows this. It's a possibility to be considered.

As far as I understand things, String Theory has an approach that involves very small scale 'extra dimensions' and that seems to achieve unification. But there's no experimental evidence for this so it's a more a matter of what takes your fancy. The human mind loves to see loose ends tied up and String Theory does just that.

Ok. But I think they should have a reason for that choice of 10 ^-35m. Why would it be a random value? Does not make sense.