Forces

Today, I & you think about the forces of gravity, universal gravitation, repulsion and electromagnetism, and you must wonder why these occur in this world.

             

              The gravity is sometimes seen as same as the universal gravitation, especially in cosmology. The difference of these is the number of counting forces. While the universal gravitation is only attraction, the gravity is additional force of attraction and centrifugal force. Centrifugal force is caused by rotation of the Earth, but what does cause the attraction? The answer is unknown. Even current research cannot clear the cause, but attraction exists on this universe. We should take this fact as very normal.

Electromagnetism is to see electricity and magnetism as same phenomena in logical view. Only this force has been made sure to have both attraction and repulsion. Electricity and also magnetism have two poles, positive and negative. ( it may be called S and N pole for magnetism. ) The same poles cause a repulsion and different poles cause an attraction each other. In electricity, the two poles exist each alone, to charge only positive is possible, only negative is possible. The more gap between positive and negative, the stronger electricity occurs. However, the two pole couldn`t exist alone in magnetism. Its pole must make pair if we separate it however smaller. If we would like to strengthen the magnetism, for a material originally have its full strength of magnetism, so find or make a better material for magnetism. Or, a better idea, the strength of magnetic field is relative to the strength of electric current, so make strong electric current. Electricity make magnetic field occur with following the law of “A right hand screw law” and magnet make electricity occur with following the phenomenon of electromagnetic induction. These are connected by natural law and its forces are brought by photon, which is called carrier.

 

The carrier exists for each 4 forces. The graviton (some people don`t acknowledge the existence of it.) is for gravity, the photon is for electromagnetism, the weak boson is for weak interaction, and the gluon is for strong interaction.

That is said that the forces separate into 4 types, the universal gravitation, the electromagnetism, the weak interaction and the strong interaction. The two of former do force to infinite distance and the electromagnetism stronger than another. The electromagnetism has both of attraction and repulsion, but another has only attraction (or maybe we cannot find repulsion of that.). The other forces do force very short range, and strong one stronger than weak one as you can guess. The stronger order is strong one > electromagnetism > weak one > gravity.

The study to get these 4 forces into 1 force is one of the hottest topic, and I think to clear where are the attraction and the repulsion from is the key of the study, don`t you think so? The string theory is said nearest the answer, but it`s so difficult to understand for me yet, so only I can is imagine such answers, and it`s interesting. Let`s imagine like that with me! See you