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Name: Ahmed R.
Status: student
Age: 18
Location: N/A
Country: N/A
Date: 4/9/2003


Question:
We know that there exist four forces in nature which are:strong nuclear forces, electromagnetic force,weak nuclear force and gravitational force. NOW is it possible to unify these forces into "single basic force" which is the most fundamental force and from which all other forces of nature are derived?


Replies:
Ahmed,

It is simple to join electromagnetic force and weak force: they are the same force. There is one difference. What we call weak force involves the generation of a heavy particle, W+, W-, or Z. All force between this particle and the other particles involved in the reaction is purely electromagnetic. As for strong force, that may or may not be the same. It uses a different kind of charge. Electric charge has two varieties, positive and negative. The charge involved in strong force has three varieties. Since vision is based on a set of three colors, scientists decided to call it color: red, green and blue are the names for the three charge varieties. Since strong force is interaction of a set of charges, it may or may not be considered linked with the electroweak force. Gravity is still a problem. A positive charge combined with a negative charge makes a neutral charge. A combination of red, green, and blue charge can also create a neutral object. Gravity is based on mass, and scientists do not know how to make a neutral mass. In many ways, gravity has properties that do not agree with the other forces. One involves light. Gravity actually exerts a force on light. Gravity exerts a force on everything. The force varies from object to object, but the acceleration is the same for everything. Albert Einstein tried to explain it with his Theory of General Relativity. Scientists are still working on it.

Dr. Ken Mellendorf
Physics Instructor
Illinois Central College



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