Abstract: This article reveals how some relative principles not obey its own principles. Practical examples given as experimental evidences which prove that: Time dilation principle cannot calculate any time dilation. Relative velocity cannot cause any time intervals. Galilean relative principle depends upon relative velocity not time dilation. Time dilation cannot keep Galilean relative principle. Two postulates of relativity are not sufficient. What relative principle, what vacuum, the postulates cannot describe. An practical experimental evidence reveals that light runs in inertial frames not in vacuum. The main problem in Michelson Morley’s experiment is that they cannot recognise the difference between vacuum and inertial frame. the experiment were conducted many times but in only single inertial frame. If the experiment conducted between two inertial frames, the result follows relative velocity of the inertial frame not time dilation. E= mc2 cannot keep any equilibrium between energy and mass. Physical interaction or physical laws not taken place only in a single inertial frame but occupies among many inertial frames. When the interaction ( physical law) occupy among many inertial frames, which time of the inertial frames does the interaction or physical law follow? What wrong in jet air craft - time dilation experiment? This follows relative theory? Was the Relative time observed by both observers: in jet air craft and another on the earth surface?