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Originally Posted by Kumar
Whether four fundamental forces interact and influence each other esp. Electromagnetic & Gravitational forces?
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The incidences of these forces are mutually exclusive in certain extent. For example, in high gravitational fields, like those near black holes, the particles are ripped by gravity field and the electromagnetic forces are broken gradually. If the gravitational force increases even more, the strong or even weak nuclear forces may break down. The particles will virtually dissolve in the dense vacuum near black hole into accretion radiation, so that just a subtle portion of original matter composed of neutrinos can reach the black hole surface.
On the other hand, in strong electromagnetic field the same process can be reversed, so that the electromagnetic radiation can condense into matter during so called photon pair materialization. So that the strong electromagnetic field can negate the action of gravitational field and vice versa.
From another perspective, the action of gravitational and electromagnetic interactions are cumulative with synergy, leading to the formation of so called composite interactions, like the gravitoelectromagnetic force and the strong nuclear force in particular. As a general rule, the composite forces are stronger, then the force constant of their components and they can reach the longer distance. The mechanism of such action is analogous the formation of the waves at the water surface. The waves bellow and above the water surface are much weaker and they can disperse readily, then the waves at the phase interface, which can transfer a higher energy density, so that they can spread to the longer distance.
For example, the weak nuclear force is very short distance force in general (it dissipates at the 10-18 m distance range), while the composite interaction of weak nuclear force and electromagnetic force (i.e. the strong nuclear force) is substantially stronger, then the product of both force constants. As the result, the strong force bosons, i.e. the gluons can act to the distance, which is ten thousand times higher, then the radius of weak nuclear force. Therefore, in certain range the strong nuclear force can be stronger, then both the forces, which are compositing it. This is the result of so called surface tension effect of space-time curvature inside of atom nuclei.
We can understand this behavior easily by model of mercury droplets. As we know, these droplets are repelling mutually when small, i.e. by the same way like particles, underlying weak nuclear force (which is always pretty repulsive). But the larger droplets tends to aggregate instead (do you remember the Terminator 2 movie?). Between both these states is the realm of strong nuclear force, which keeps the dense droplets of nuclear matter together. If the droplet of nuclei becomes too large, it tends to disperse by radiative decay under release of fission energy. If the droplets are small, they can be fused into larger ones instead, under release of fusion energy.
By such way, the mutual action of fundamental forces can be quite complex and unpredictable.
