[go: nahoru, domu]

Classical electromagnetism: Difference between revisions

Content deleted Content added
faraday did not "suggest an electromagnetic field". rather i'm pretty sure he suggested the existence of one? some mathematicians get touchy about the E word (ol' kronecker had a stick up his ass that's for sure), so mb use 'presence' to appease that crowd? either way, it was missing words.
Added detail
Tags: Reverted Visual edit Mobile edit Mobile web edit
Line 2:
{{short description|Branch of theoretical physics that studies consequences of the electromagnetic forces between electric charges and currents}}
{{electromagnetism|cTopic=Electrodynamics}}
'''Classical electromagnetism''' or '''classical electrodynamics''' is a branch of [[theoretical physics]] that studies the interactions between [[electric charge]]s and [[electrical current|currents]] using an extension of the [[classical Newtonian model]] of mechanics plus the Maxwell Lorentz theory for the electromagnetic fields. The theory provides a description of electromagnetic phenomena whenever the relevant [[length scale]]s and field strengths are large enough that [[quantum mechanical]] effects are negligible. For small distances and low field strengths, such interactions are better described by [[quantum electrodynamics]].
 
Fundamental physical aspects of classical electrodynamics are presented in many texts, such as those by [[Richard Feynman|Feynman]], [[Robert B. Leighton|Leighton]] and [[Matthew Sands|Sands]],<ref>Feynman, R. P., R .B. Leighton, and M. Sands, 1965, ''[[The Feynman Lectures on Physics]], Vol. II: the Electromagnetic Field'', Addison-Wesley, Reading, Massachusetts</ref> [[David J. Griffiths|Griffiths]],<ref>{{cite book|last1=Griffiths|first1=David J.|title=Introduction to Electrodynamics|date=2013|publisher=Pearson|location=Boston, Mas.|isbn=978-0321856562|edition=4th}}</ref> [[Wolfgang K. H. Panofsky|Panofsky]] and Phillips,<ref>Panofsky, W. K., and M. Phillips, 1969, ''Classical Electricity and Magnetism'', 2nd edition, Addison-Wesley, Reading, Massachusetts</ref> and [[John David Jackson (physicist)|Jackson]].<ref name="Jack">{{Cite book|last=Jackson|first=John D.|title=Classical Electrodynamics|publisher=Wiley|location=New York|year=1998|edition=3rd|isbn=978-0-471-30932-1|title-link=Classical Electrodynamics (book)}}</ref>
 
Classical electrodynamics needs little modification in the modern framework of special relativity and indeed also within general relativity though the mathematical forms take on more complex forms. The quantum theory requires essentially new aspects and new viewpoint for the theory where for example field probabilities and charged particle anti-particle pair creation and anihilation are needed.
 
== History ==