Theory of relativity has quality length contraction
Relativity of simultaneity: Two events, simultaneous for one observer, may not be simultaneous for another observer if the observers are in relative motion.
Time dilation: Moving clocks are measured to tick more slowly than an observer's "stationary" clock.
Length contraction: Objects are measured to be shortened in the direction that they are moving with respect to the observer.
Maximum speed is finite: No physical object, message or field line can travel faster than the speed of light in a vacuum.
The effect of gravity can only travel through space at the speed of light, not faster or instantaneously.
Mass–energy equivalence: E = mc2, energy and mass are equivalent and transmutable.
Relativistic mass, idea used by some researchers.The defining feature of special relativity is the replacement of the Galilean transformations of classical mechanics by the Lorentz transformations. (See Maxwell's equations of electromagnetism.)
possesses quality exhibits quality displays quality features quality has characteristic