The Gravity Field of an Extremal Black Hole

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The idea of an extremal black hole has to do with the fact that black holes are characterized by their mass, charge, and spin. If you're an uncharged particle, if you are not yourself electrically charged, then you will just fall into the black hole. There's a discontinuity in the internal spacetime structure as you go from a regular black hole to an extremal one. It's right barely at the point where there might be naked singularity, but there isn't really. They're interesting things for theorists to think about.

Welcome to the August 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!

Blog post with questions and transcript: https://www.preposterousuniverse.com/podcast/2023/08/07/ama-august-2023/

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