The Metric Tensor Field Is the Metric That Defines the Geometry of Spacetime

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Spacetime has a particular field, the metric tensor field, from which we can calculate its geometry. The thing that has angular momentum is really the value of the metric Tensor field. If you start with a spinning star and it collapses to a black hole, the angular momentum will be the same as the angular momentum that we calculate in the metric Tensor Field. A non-spinning black hole is perfectly spherical; not true for a spinning one.

Welcome to the February 2023 Ask Me Anything episode of Mindscape! These monthly excursions are funded by Patreon supporters (who are also the ones asking the questions). We take questions asked by Patreons, whittle them down to a more manageable number — based primarily on whether I have anything interesting to say about them, not whether the questions themselves are good — and sometimes group them together if they are about a similar topic. Enjoy!

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