The Four Fundamental Forces in Nature
Scientists are currently
trying to find a theory (and a set of equations that incorporate everything!)
that will bind together the four forces into one - the Grand Unified Theory.
At the moment there
are four forces that govern behaviour in the Universe.
|
Name
|
Domain
|
Particle
(see
later)
|
Relative
strength
|
I
|
Strong
Nuclear Force |
Within
the nucleus - acts between nucleons over a very short range |
Gluons (was thought to be pions) |
1
|
II
|
Electromagnetic
Force |
Between
charged particles - binds atoms and molecules together |
Photons (quanta of electromagnetic radiation E = hf) |
10-2
|
III
|
Weak
Nuclear Force |
Within
the nucleus - governs radioactive beta decay - involves leptons |
W
bosons and z-particles (not on the syllabus) |
10-6
|
IV
|
Gravitational
Force |
Acts
between all masses - very important for large masses in space such
as planets and stars |
Gravitons
(not yet detected!) |
10-38
|