Poetry for physicists
In an effort to discover what makes the humanities difficult and unpopular with some science and engineering students, 14 Cornell faculty from the disciplines of chemistry, physics, applied mathematic...
In an effort to discover what makes the humanities difficult and unpopular with some science and engineering students, 14 Cornell faculty from the disciplines of chemistry, physics, applied mathematic...
The Bohr–Einstein ``weighing-of-energy'' debate and the principle of equivalence
The Bohr–Einstein debate over the ``weighing of energy'' and the validity of the time–energy uncertainty relation is reexamined in the context of gravitation theories that do not respect the...
The Bohr–Einstein debate over the ``weighing of energy'' and the validity of the time–energy uncertainty relation is reexamined in the context of gravitation theories that do not respect the...
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The twin paradox revisited
American Journal of Physics -- September 1990 -- Volume 58, Issue 9, pp. 822-825
Issue Date: September 1990
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The twin paradox of special relativity results from failing to recognize the fundamental asymmetry between the two twins: One and only one twin changes direction and thus undergoes acceleration. What happens if the universe is closed, so that the twin in the rocket can return to Earth without changing direction? The twin paradox is reformulated in a closed universe (a cylinder) and then resolved by showing that there is still a (much more subtle!) asymmetry between the two twins.
©1990 American Association of Physics Teachers
©1990 American Association of Physics Teachers
| History: | Received 31 August 1989; accepted 18 October 1989 |
| Permalink: | http://dx.doi.org/10.1119/1.16373 |
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