= Proper reference frame (flat spacetime)
{wiki=Proper_reference_frame_(flat_spacetime)}
In the context of relativity, a **proper reference frame** refers to a coordinate system in which an observer measures the time and position of events without being affected by relativistic effects resulting from relative motion. It is particularly associated with the context of flat spacetime, which is a concept from special relativity where spacetime is considered to be "flat" and not curved by gravitational effects.
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