8 25 1 reference frames and the classical Galilean relativity Standard geometry we use for the special theory of relativity has two inertial reference frames called s and s’, with their x-andx’- coordinate axes collinear. Imagine collections of clocks distributed at rest throughout each respective frame; the clocks all are set to O s when the two origins coincide. Observer is at rest in frame s 825.1 reference frames and the classical Galilean relativity Observer is at rest in frame sy4 ¾Standard geometry we use for the special theory of relativity has two inertial reference frames called S and S’, with their x- and x’- coordinate axes collinear. Imagine collections of clocks distributed at rest throughout each respective frame; the clocks all are set to 0 s when the two origins coincide. Observer is at rest in frame S. §25.1 reference frames and the classical Galilean relativity Observer is at rest in frame S’. §25.1 reference frames and the classical Galilean relativity