Clarifying spatial distance measurement
| Autor: | Colin MacLaurin |
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| Rok vydání: | 2019 |
| Předmět: | |
| DOI: | 10.48550/arxiv.1911.07500 |
| Popis: | We examine length measurement in curved spacetime, based on the 1+3-splitting of a local observer frame. This situates extended objects within spacetime, in terms of a given coordinate which serves as an external reference. The radar metric is shown to coincide with the spatial projector, but these only give meaningful results on the observer's 3-space, where they reduce to the metric. Examples from Schwarzschild spacetime are given. Comment: 6 pages, 0 figures, submitted to the proceedings of the 2018 Marcel Grossmann conference, Rome. v2 has minor rewording and typo corrections |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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