In 2018 I wrote:
Finally, a link to someone who’s math and physics didn’t stop at undergraduate level!
For future reference: a solution to a simplified form of Maxwell’s equations is theoretically (though not practically) possible, under the twin assumptions that the speed of light is both infinitely fast and finitely slow.
(The author also observes that Tesla didn’t attach any importance to the math, and believed that his black box would work, once he worked out the details: the similarities and differences to Theranos are entertaining)