stephen hawking talks of unification of physics in chapter10 a brief history of time has it been achieved?

Question

achieved or expected to be achieved in near future is it?

Answer 1

No. I don't see unification with gravity happening anytime soon. And even if someone came up with a theory to do it (some theorist may have it on his desk already), its implications might not be testable until our high-energy particle experiments get many orders of magnitude higher.

But who knows really. Maybe the LHC will help somehow.

Answer 2

Three of the four fundamental interactions (weak, stong and electrostatic) have been unified in what is know as The Standard Model. Gravity lies outside this, and looks to remain there for the near future at least.

String theory is one of the attempts to create this final unification, but a number of noteworthy physicists have recently expressed severe doubts about it (it has yet to make a single observable prediction, so has as yet no experimental support), to the extent that they believed an entire generation of physicists have effectively wasted their careers on it.

Roger Penrose - the UKs best physicist and one of the top in the world - believes that tinkering with quantum mechanics (as string theory does) will never achieve this but that a new theory is required of which quantum mechanics and general relativity are a subset. See "The Road to Reality" (not an easy read, I warn you, but very thorough).

Answer 3

This is known as the Unification of the 4 forces-:

Strong Nuclear Force
Electromagmnetic Force
Gravitational Force
Weak Nuclear Force

So far scientists have not been able to unite all four forces; part of the problem is the elusive 'graviton' which is postulated to be the carrier of the gravitatational force.

This article is quite good regarding the four forces-:
http://www.geocities.com/angolano/Astronomy/FundamentalForces.html

Answer 4

it is expected to achieve...the scientists are still working on it.....

Answer 5

Not yet. (You could contribute!!!)