Matches in DBpedia 2016-04 for { ?s ?p "Proper length or rest length refers to the length of an object in the object's rest frame.The measurement of lengths is more complicated in the theory of relativity than in classical mechanics. In classical mechanics, lengths are measured based on the assumption that the locations of all points involved are measured simultaneously. But in the theory of relativity, the notion of simultaneity is dependent on the observer."@en }
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- Proper_length comment "Proper length or rest length refers to the length of an object in the object's rest frame.The measurement of lengths is more complicated in the theory of relativity than in classical mechanics. In classical mechanics, lengths are measured based on the assumption that the locations of all points involved are measured simultaneously. But in the theory of relativity, the notion of simultaneity is dependent on the observer.".