What is Twin paradox?
The '''twin paradox''' in [[physics]] is a [[thought experiment]] in [[special relativity]]. It involves [[identical twins]], one of whom makes a journey into space in a high-speed rocket and returns home to find that the twin who remained on Earth has aged more. The paradox depends upon the unspoken idea that the passage of time is the same in all circumstances. But this is not correct. Time is relative and the [[speed of light]] through a vacuum is the only constant.<ref>Einstein A. & Infield L. [1938] 1966. ''The evolution of physics''. New York: Simon & Schuster, p177{{ndash}}192.</ref> And the universe is [[theory of relativity|relativistic]], not Newtonian. Every single test which has been made has shown this. == Related pages == * [[Special relativity]] == References == {{reflist}} {{-}} {{physics-stub}} [[Category:Relativity]]