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Recorded: 2020/05/21 Released: 2020/08/16
Randy tells Jim about charged black holes, which exhibit an interesting reduction in their gravitational attraction. They discuss the Reissner-Nordstrom metric and an alternative theory.
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Notes:
1. The papers we read for this program:
- Lo, CK "Comments on 'Unification of Gravity and Electromagnetism by Mohammed A. El-Lakany' and Einstein's Unification" Journal of Physical Science and Application 7, 28 (2017).
- Graves, J.C. and D.R. Brill, "Gravitational Bounce." Phys. Rev. 120, 1507 (1960).
- Carter, B., "Complete Analytic Extension of the Symmetry Axis of Kerr's Solution of Einstein's Equations." Phys. Rev. 141, 1242 (1966). The next reference is so short, familiarity with this one is important.
- Carter, B., "The Complete Analytic Extension of the Reissner-Nordstrom Metric in the Special Case e2 = m2." Phys. Lett. 21, 423 (1966).
- de la Cruz, V. and W. Israel, "Gravitational Bounce." Il Nuovo Cimento 51, 6444 (1967).
2. Related Episodes of Physics Frontiers:
- Physics Frontiers 38: Why is Space-Time Four Dimensional?
- Physics Frontiers 36: The Electromagnetic Stress Tensor in Metamaterials.
- Physics Frontiers 34: CPT Symmetry and Gravitation.
- Physics Frontiers 18: The 2T Physics of Itzhak Bars.
- Physics Frontiers 7: Virtual Gravitational Dipoles.
- Physics Frontiers 6: General Relativity for the Experimentalist.
3. The Nature of Space and Time [Amazon], a debate between Stephen Hawking and Roger Penrose about relativity and cosmology. A very accessible, and recommended, discussion. As I mentioned to Randy, it's a good place to get acquainted with Penrose diagrams.
4. Gravitation [Amazon} by Misner, Thorne, and Wheeler. Contains all the information about gravity that you always wanted to know.
5. David Waite's general relativity on-line textbook and YouTube Channel.
6. Please visit and comment on our subreddit, and if you can help us keep this going by contributing to our Patreon, we'd be grateful.
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