# Linked Electric and Magnetic Fields for Source-Free Maxwell Equations

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This Demonstration shows the electric and magnetic field lines (in red and blue) of localized, timeÃ¢Â€Âdependent, finiteÃ¢Â€Âenergy, rational solutions (in , , , and ) of the sourceÃ¢Â€Âfree Maxwell equations that can be interpreted as classical (nonquantum) photons. For all times, any pair of electric and magnetic field lines is linked.

Contributed by: Michael Trott (March 2011)

From: *The Mathematica GuideBook for Programming*, second edition by Michael Trott (© Springer, 2008).

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