THE STRUCTURE OF WORLD
HISTORY
Man has always been interested to find how the world is structured. Long long ago scientists suggested that the world is made up of certain indivisible small particles. The number of the particles in the world is large but the varieties of particles are not may. Old Indian philosopher Kanadi derives his name from this proposition ( In Sanskrit or Hindi Kana means means a small particles ).
Experimental Work
After extensive experimental work people arrived at the conclusion that the world is made up of just three types of ultimate particles, the proton, the neutron and the electron. All objects which we have around us, are aggregation of atoms and molecules. The molecules are composed of atoms and the atoms have at their heart a nucleus containing protons and neutrons. Electrons move around this nucleus in special arrangements. It is the number of protons, neutrons and electrons in an atoms that decide all the properties and behaviour of a material. Large number of atoms combine to from an object of moderate or large size. However, the laws that we generally deduce for these macroscopic objects are not always applicable to atoms, molecules, nuclei or the elementary particles These laws knows as classical physics deal with large size object only. When we say a particle in classical physics we mean an object which is small as compared to other moderate or large size object and for which the classical physics is valid. It may still contain millions and millions of atoms in it. Thus, a particle of dust dealt in classical physics may contain about 10^18 atoms.
IN 20 century
20th century experiments have revealed another aspect of the construction of worlds. There are perhaps no ultimate indivisible particles. Hundreds of elementary particles have been discovered and there are free transformations from one such particle to the other. Nature is seen to be a well-connected entity.
World map
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