In German.
Translated title: On the influence of gravity on the speed of light.
One of the first mentions of the clock paradox.
In German.
Translated title: On the electrodynamics of moving bodies.
For translation, see Item 148.
The clock paradox is introduced.
Criticisms of Dingle's ideas on special relativity. It is assumed that, when a clock is set in motion, it does in fact alter its rate of working, and not that special relativity merely gives the transformation rule from the time-coordinates of one observer to those used by another, relatively moving. A clock is defined as a succession of events which can be identified by different observers without recourse to coordinate systems. Such clocks always show the same changes of rate when set in motion. It is claimed that the Lorenz contraction is real. If the equation for the period of a simple pendulum is transformed according to the Lorenz rules for the transformations of mass, length and electromagnetic force, the period changes according to the rule for the "dilatation of time." It is argued that this is a dynamical explanation of the dilatation, which is therefore also real.
Further testimony in the Dingle-Epstein controversy.
The writer contends that the clock paradox in relativity is due to an error in Einstein's paper (Ann. Phys. 17:891, 1905) concerning acceleration effects.
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