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The white line represents a plane of simultaneity being moved from the past to the future. In physics, the relativity of simultaneity is the concept that distant simultaneity – whether two spatially separated events occur at the same time – is not absolute, but depends on the observer's reference frame.
English: Spacetime diagram illustrating relativity of simultaneity. The dotted line is the set of events regarded by a stationary observer as simultaneous. The dashed line is the set of events regarded by an observer moving at as simultaneous.
A straight line connecting these two events is always the time axis of a possible observer for whom they happen at the same place. Two events which can be connected just with the speed of light are called lightlike. In principle a further dimension of space can be added to the Minkowski diagram leading to a three-dimensional representation.
Two events can be defined by the condition "two clocks are simultaneously at one place", i.e., when W′ passes each W 1 and W 2. For both events the two readings of the collocated clocks are recorded. The difference of the two readings of W 1 and W 2 is the temporal distance of the two events in S, and their spatial distance is d. The ...
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.
The surface of the light cone: the events which can be reached by a light ray starting at A, or from which a light ray reaching A could have originated. The black areas outside the double cone consist of the events whose temporal ordering with respect to A depends on the frame of reference.
In relativistic physics, the Born coordinate chart is a coordinate chart for (part of) Minkowski spacetime, the flat spacetime of special relativity. It is often used to analyze the physical experience of observers who ride on a ring or disk rigidly rotating at relativistic speeds , so called Langevin observers .
Specific clock synchronization procedures were defined by Einstein and give rise to a limited concept of simultaneity. [1] Two events are called simultaneous in a chosen reference frame if and only if the chosen coordinate time has the same value for both of them; [2] and this condition allows for the physical possibility and likelihood that ...