Visualisation of Cherenkov Radiation and the Fields of a Moving Charge

Details Visualisation of Cherenkov Radiation and the Fields of a Moving Charge Visualisation of Cherenkov Radiation and the Fields of a Moving Charge

2006-02-09

arxiv.org/abs/physics/0602061v3

European Journal of Physics vol. 27 (2006) pp. 521-529

Physics

Physics Education

18 pages, 8 figures, 2 MATLAB listings. Version 2: Corrected display for letter paper format. Added publication info. Version

Scientific paper

10.1088/0143-0807/27/3/006

For some physics students, the concept of a particle travelling faster than the speed of light holds endless fascination, and Cherenkov radiation is a visible consequence of a charged particle travelling through a medium at locally superluminal velocities. The Heaviside--Feynman equations for calculating the magnetic and electric fields of a moving charge have been known for many decades, but it is only recently that the computing power to plot the fields of such a particle has become readily available for student use. This article investigates and illustrates the calculation of Maxwell's D field in homogeneous isotropic media for arbitrary, including superluminal, constant velocity, and uses the results as a basis for discussing energy transfer in the electromagnetic field.

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