Simultaneity Time is no longer an absolute quantity! Simultaneity of events depends on the observer Same time at same place /timing by light A BB (a)Observer o(b)Observer OSimultaneity 7 Time is no longer an absolute quantity! Simultaneity of events depends on the observer A1 B1 O1 . A2 O2 B2 . v (a) Observer O1 (b) Observer O2 Same time at same place / timing by light