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  2. Spacetime diagram - Wikipedia

    en.wikipedia.org/wiki/Spacetime_diagram

    The most well-known class of spacetime diagrams are known as Minkowski diagrams, developed by Hermann Minkowski in 1908. Minkowski diagrams are two-dimensional graphs that depict events as happening in a universe consisting of one space dimension and one time dimension. Unlike a regular distance-time graph, the distance is displayed on the ...

  3. Relativity of simultaneity - Wikipedia

    en.wikipedia.org/wiki/Relativity_of_simultaneity

    The dotted horizontal line represents the set of points regarded as simultaneous with the origin by a stationary observer. This diagram is drawn using the (x, t) coordinates of the stationary observer, and is scaled so that the speed of light is one, i.e., so that a ray of light would be represented by a line with a 45° angle from the x axis.

  4. Observer (special relativity) - Wikipedia

    en.wikipedia.org/wiki/Observer_(special_relativity)

    Where Einstein referred to "an observer who takes the train as his reference body" or "an observer located at the origin of the coordinate system", this group of modern writers says, for example, "an observer is represented by a coordinate system in the four variables of space and time" [3] or "the observer in frame S finds that a certain event ...

  5. Born coordinates - Wikipedia

    en.wikipedia.org/wiki/Born_coordinates

    Consider how a static observer at R=0 might determine his distance to a ring riding observer at R = R 0. At event C he sends a radar pulse toward the ring, which strikes the world line of a ring-riding observer at A′ and then returns to the central observer at event C″. (See the right hand diagram in Fig. 7.) He then divides the elapsed ...

  6. File:Spacetime diagram development B.svg - Wikipedia

    en.wikipedia.org/wiki/File:Spacetime_diagram...

    You are free: to share – to copy, distribute and transmit the work; to remix – to adapt the work; Under the following conditions: attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses ...

  7. Frame fields in general relativity - Wikipedia

    en.wikipedia.org/wiki/Frame_fields_in_general...

    Frame fields of a Lorentzian manifold always correspond to a family of ideal observers immersed in the given spacetime; the integral curves of the timelike unit vector field are the worldlines of these observers, and at each event along a given worldline, the three spacelike unit vector fields specify the spatial triad carried by the observer.

  8. Event (relativity) - Wikipedia

    en.wikipedia.org/wiki/Event_(relativity)

    The concept of an event in relativity as a point in spacetime with arbitrarily high precision size breaks down when considering the uncertainty principle, which stipulates that there is a minimum size or accuracy for measurements made in the universe, and you cannot have arbitrary precision in measurements.

  9. File:Minkowski diagram - time travel.svg - Wikipedia

    en.wikipedia.org/wiki/File:Minkowski_diagram...

    Minkowski diagram: Sending a message with superluminal speed from O via A to B in the own past. Both observer consider the temporal order of the pairs of events O and A as well as A and B different. Date: 12 September 2011, 11:25 (UTC) Source: Minkowski_diagram_-_time_travel.png; Author: Minkowski_diagram_-_time_travel.png: Wolfgangbeyer

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