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fundamental interaction
(redirected from Four Forces of nature)

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fundamental interaction

In physics, the effect of any of the four fundamental forces—gravitational, electromagnetic, strong, and weak. All known natural forces can be traced to these fundamental interactions. Gravitation is the attractive force between any two objects that have mass; it causes objects to fall to the ground and maintains the orbits of planets around the Sun. Electromagnetic force is responsible for the attraction and repulsion between electric charges and explains the chemical behaviour of atoms and the properties of light. The strong force binds quarks together in protons, neutrons, and other hadrons and also holds the protons and neutrons of an atomic nucleus together, overcoming the repulsion of the positively charged protons for each other. The weak force is observed in certain forms of radioactive decay (see radioactivity) and in reactions that fuel the Sun and other stars.


fundamental interaction [¦fən·də¦ment·əl ‚in·tər′ak·shən]
(particle physics)
One of the fundamental forces that act between the elementary particles of matter.


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The theory is fundamental to scientists' understanding of the way the basic building blocks of matter behave, and helps to unify how these interact with three of the four forces of nature.
The lumpiness might, however, offer insight into exactly how the four forces of nature became unified, while contrasting theories on how clusters of quarks formed protons and other particles collectively known as hadrons.
 
 
 
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