Considers the quantum limitations on the accuracy of the conversion of time-like measurements into space-like measurements, illustrated in figure 4, p.260. Space-like distances are measured by means of a clock.
Refers to an advertisement in Time magazine by the Martin Company titled "What is Time?" and asks why the Company should pose such an esoteric question.
"The reason is that the problem of speed vs time is no longer a matter for Einsteins. With rockets and satellites bristling all over, it becomes practical to know for sure whether time (hence life) is affected by speed."
According to a scientific experiment with a clock, or "a handy substitute-the meson" explained in the article, "a meson in flight lives about 15 times longer than a meson at rest. You can indeed put the brakes on time." (See Item 14 for scientific experiment.)
A sketch is given of the ideas of time found in mathematical physics from the time of Newton to the present day.
In German. English summary.
Translated title: Relativistic time dilatation in an artificial satellite.
Applies the general theory of relativity to the problem of time-measurement in a satellite. Concludes that there should be a measurable apparent slowing of satellite-borne clocks, of the order of several thousandths of a second annually.
The general relativity theory is discussed, and an outline of the several experimental verifications of the theory is reviewed. Consideration is given to the use of atomic clocks
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