Science For Future


Bosons & Fermions

All the particles in the universe can be classified into Bosons and Fermions. The main difference between them is that Bosons have integer spin (0, 1, 2, 3) while Fermions have half spin ( ½ ). When we rotate a perfect sphere it looks the same for every angle and such a particle has spin zero. When we rotate an arrow (®) in the plain of the paper it looks the same when we rotate it by 360° and such a particle has spin one. When we rotate a double headed arrow («) in the plain of the paper it looks the same when we rotate it by 180° or it looks the same twice when we rotate it by 360° and such a particle has spin two. When we rotate some particles they looks the same only when we rotate it by 360x2° and such particles have spin half. Fermions obey Pauli’s exclusion principle while Bosons do not. 

Bosons are force-carrying particles. Gravitational force, electromagnetic force, weak nuclear force and strong nuclear force are due to Bosons. So far five Bosons have been discovered. They are the photon, the gluon, the W boson, the Z boson and now the Higgs boson.

Fermions make up the matter in the universe. Protons, neutrons, electrons, mesons and neutrinos are fermions.

 

 

 

 

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