Page "Trouton–Noble experiment" Paragraph 35

Following this line of reasoning, Rohrlich ( 1966 ) distinguished between " apparent " and " true " Lorentz transformations.

For example, a " true " transformation of length would be the result of a direct application of the Lorentz transformation, which gives the non-simultaneous positions of the endpoints in another frame.

On the other hand, length contraction would be an example of an apparent transformation, since the simultaneous positions of the endpoints in the moving frame must be calculated in addition to the initial Lorentz transformation.

Furthermore, Cavalleri / Salgarelli ( 1969 ) distinguished between " synchronous " and " asynchronous " equilibrium conditions.

In their view, synchronous consideration of forces should only be used for the object's rest frame, while in moving frames the same forces should be considered asynchronously.