Hum 300 History And Methods Of Science

7 . What is antimatter and how do we hump it existsAntimatter is a matter do up of antiparticles . Antiparticle is a subatomic particle that has the like bountiful money as another(prenominal) particle and pit only when opposition values of somewhat other property or properties . For font the antiparticle of the electron is the antielectron , which has a compulsory flutter equal in order of magnitude to the electron s forbid betoken . The antiproton has a interdict consecrate equal to the proton s positive hurry The neutron and the antineutron crap magnetic moments opposite in sign copulation to their spins antiparticle A Dictionary of natural philosophy . Ed . John Daintith . Oxford University abridge , 2000Carl David Anderson was the world-class to experimentally unveil antiparticles in 1932 . He began to charter cosmic rays by photographing their tracks in a cloud bedroom and notable that particles of positive deposit occurred as abundantly as those of negative devote .

The negative particles were clearly electrons but those of positive charge could not be protons (the only positive particles cognize at the time ) as they did not produce capable ionisation in the chamber . Eventually Anderson concluded that such results could logically be taken only in impairment of particles of a positive charge and a mass of the same of magnitude as that normally possessed by a salve negative electron . It was in fact the positron or positive electron , whose existence he inform in September 1932 Anderson , Carl David A Dictionary of Scientists . Oxford University Press , 1999 . Oxford course credit Online . Oxford University Press...If you motivation to get a full essay, order it on our website: Orderessay

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