bn:03575596n
Noun Concept
Categories: Theory of relativity
EN
proper length  proper distance  rest length
EN
Proper length or rest length is the length of an object in the object's rest frame. Wikipedia
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EN
Proper length or rest length is the length of an object in the object's rest frame. Wikipedia
distance between two events, measured in an inertial reference frame where both events are simultaneous Wikidata
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