Keywords: Time-dilation-002.svg The clock as observed in a frame where it is moving at some speed 'v' In this case the photon traces out a triangular path which is longer than in the rest frame But since the speed of light is the same in all frames this necessarily leads to a lengthening of the period of the clock as derived in the image SVG version of the original Image Time-dilation-002 jpg en wikipedia Hansmuller 2006 01 13 first version ; 2007 12 31 last version Mdd4696 wikipedia en Mdd4696 Original upload log page en wikipedia Time-dilation-002 svg 2007-12-31 11 07 DVdm 1000×450× 18513 bytes <nowiki>Correction</nowiki> 2007-12-31 11 05 DVdm 1000×450× 18513 bytes <nowiki>Delta notation to conform with rest of article and to avoid confusion with twin picture</nowiki> 2006-01-13 03 05 Mdd4696 1000×450× 17204 bytes <nowiki>Swapped A and B</nowiki> 2006-01-13 02 32 Mdd4696 1000×450× 17204 bytes <nowiki>The clock as observed in a frame where it is moving at some speed 'v' In this case the photon traces out a triangular path which is longer than in the rest frame But since the speed of light is the same in all frames this necessarily leads to</nowiki> Special relativity |