The Minkowski metric in non-inertial observer radar coordinates

Details The Minkowski metric in non-inertial observer radar coordinates The Minkowski metric in non-inertial observer radar coordinates

2004-12-03

arxiv.org/abs/physics/0412024v2

Am.J.Phys. 73 (2005) 1117-1121

Physics

Classical Physics

Revtex4, 6 pages, 1 figure

Scientific paper

10.1119/1.2060716

We give a closed expression for the Minkowski (1+1)-dimensional metric in the radar coordinates of an arbitrary non-inertial observer O in terms of O's proper acceleration. Knowledge of the metric allows the non-inertial observer to perform experiments in spacetime without making reference to inertial frames. To clarify the relation between inertial and non-inertial observers the coordinate transformation between radar and inertial coordinates, also is given. We show that every conformally flat coordinate system can be regarded as the radar coordinate system of a suitable observer for a suitable parametrization of the observer worldline. Therefore, the coordinate transformation between arbitrarily moving observers is a conformal transformation and conformally invariant (1+1)-dimensional theories lead to the same physics for all observers, independently of their relative motion.

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