On Einstein’s resolution of the twin clock paradox
C. S. Unnikrishnan
Gravitation Group, Tata Institute of Fundamental Research, Mumbai, India
In: Current Science, Vol. 89, No. 12, p. 2008 (2005)
Abstract: Einstein addressed the twin paradox in special relativity in a relatively unknown, unusual and rarely cited paper written in 1918, in the form of a dialogue between a critic and a relativist. Contrary to most textbook versions of the resolution,
Einstein admitted that the special relativistic time dilation was symmetric for the twins, and he had to invoke, asymmetrically, the general relativistic gravitational time dilation during the brief periods of acceleration to justify the asymmetrical aging. Notably, Einstein did not use any argument related to simultaneity or Doppler shift in his analysis. I discuss Einstein’s resolution and several conceptual issues that arise. It is concluded that Einstein’s resolution using gravitational time dilation suffers from logical and physical flaws, and gives incorrect answers in a general setting. The counter examples imply the need to reconsider many issues related to the comparison of transported clocks. The failure of the accepted views and resolutions is traced to the fact that the special relativity principle formulated originally for physics in empty space is not valid in the matter-filled universe.
Siehe auch YouTube-Video vom Autor: Galileo, Time and Space: Gravity affecting clocks
- 26. Januar 2013