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Weyl' S Theory of the Combined Gravitational-electromagnetic Field

Imagine that it is early 1918, a little more than two years since Einsteins announcement of the theory of general relativity. Karl Schwarzschild, a German physicist (and, tragically, a fatality on the front line of the Great War), has already shown that Einsteins equations predict the previously unexplained perihelion shift of Mercury exactly. In less than a year, the noted British scientist Arthur Eddington will make use of a total solar eclipse to measure the deection of starlight by the sun, which will again conrm the predictions of general relativity. Ten years earlier, Einsteins 1905 theory of special relativity had become accepted scientic thought, and now even the lay public is excited about Einsteins strange ideas of warped space and relative time. There is no forceof gravity, no action at a distance pulling one gravitating body to another. Planets move in ellipses around the sun because warped space tells them how to move, and the suns gravity tells space how to warp. As far as a planet is concerned, its moving in a straight line, doing the only thing it knows how to do. Similarly, time isnt what we think it is. The ticking rate of a wristwatch depends not only on the wearers relative velocity to some observer, it is also a¤ected by gravity. Maybe time travel really is possible! Einstein is on the cusp of becoming the worlds rst scientic superstar.