Méthodes de mesure de l'infiniment grand et l'infiniment petit

Abstract

WE highlight in this thesis the methods of measuring infinitely small and large without limits. We can note that the matter has three levels : microscopic level ; where we study atoms and molecules, human level : which ranges from some millimeters to several kilometers, ana cosmological level ; which includes the study of planets and stars. There are many ways to measure distances outside the human level. Each method has a specific level at which it is applied. The measurement of cosmic distances is based on engineering and physical methods.These methods can be applied to measure the distances of stars and planets close to Earth, Contrary to measuring the distance of brightness, it requires determining the distance of the farthest galaxies. If we talk about the methods that enable us to determine the size of the infinitesimal particles and distinguish their shapes, we find the methods of representation of particle size distribution, In addition to some techniques such as the technique that requires a particle extraction phase and the scattering of light by spherical particles.