The thought experiment in special relativity became more widely known when a Northern Irish physicist, the originator of what  included a modified version?
Bell's spaceship paradox:  It was first designed by E. Dewan and M. Beran in 1959 and became more widely known when J. S. Bell included a modified version. John Stewart Bell: John Stewart Bell FRS (28 June 1928 – 1 October 1990) was a Northern Irish physicist, and the originator of Bell's theorem, an important theorem in quantum physics regarding hidden variable theories.
Bell's theorem