Comment on Jackson’s analysis of electric charge quantizationdue to interaction with Dirac’s magnetic monopole


College of Optical Sciences, The University of Arizona, Tucson, Arizona 85721


In J.D. Jackson’s Classical Electrodynamics textbook, the analysis of Dirac’s charge quantization condition in the presence of a magnetic monopole has a mathematical omission and an all too brief physical argument that might mislead some students. This paper presents a detailed derivation of Jackson’s main result, explains the significance of the missing term, and highlights the close connection between Jackson’s findings and Dirac’s original argument