File:Rotating Ring Cyl Ring2RingRadar.svg

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Description

This schematic figure illustrates the concept of radar distance between two Langevin observers in Minkowski spacetime. Langevin observers rotate rigidly around r = 0 (in a standard cylindrical chart) with angular velocity ω.

In the figure, a Langevin observer sends out a radar pulse at event A which hits another Langevin observer riding the same rotating ring at B′ which returns to the first observer at event A′;. To determine the radar distance, he divides the elapsed time (as measured by an ideal clock which he carries) by two.

At right, the ring is rotating counterclockwise. At left, it is rotating clockwise. Equal but oppositely directed rotation will result in different values for the radar distance. In other words, a pair of Langevin observers riding a rotating ring who each determine radar distances to their peer will obtain different values. This illustrates the fact that radar distance "in the large" is not symmetric.
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Source Own work based on: Rotating Ring Cyl Ring2RingRadar.png
Author Traced by Stannered; original by Hillman
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(Reusing this file)		 GFDL original
Other versions Rotating Ring Cyl Ring2RingRadar.png
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GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.
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Date/TimeThumbnailDimensionsUserComment
current17:23, 21 April 2007Thumbnail for version as of 17:23, 21 April 2007402 × 162 (5 KB)Stannered (talk | contribs)Moving text a little to accommodate for MW rendering
17:22, 21 April 2007Thumbnail for version as of 17:22, 21 April 2007402 × 162 (5 KB)Stannered (talk | contribs){{Information |Description=This schematic figure illustrates the concept of radar distance between two Langevin observers in Minkowski spacetime. Langevin observers rotate rigidly around r = 0 (in a standard cylindrical chart) with angular velocity ω.

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