File:Andrew Hamilton schwarzchild waterfall.gif
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Summary
| DescriptionAndrew Hamilton schwarzchild waterfall.gif |
English: The picture of space falling into a black hole has a sound mathematical basis, first discovered in 1921 by the Nobel prize-winner Alvar Gullstrand, and independently by the French mathematician and politician Paul Painlevé, who was Prime Minister of France in 1917 and then again in 1925. Physically, the Gullstrand-Painlevé metric describes space falling into the Schwarzschild black hole at the Newtonian escape speed. Outside the horizon, the infalling speed is less than the speed of light. At the horizon, the infalling speed equals the speed of light. And inside the horizon, the infalling speed exceeds the speed of light. Although nothing can travel through space faster than the speed of light, space itself can infall at any speed. |
| Date | Unknown date |
| Source | https://jila.colorado.edu/~ajsh/insidebh/waterfall.html |
| Author | Andrew Hamilton |
Licensing
| Public domainPublic domainfalsefalse |
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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Federal Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
Captions
A picture of space falling into a Schwarzschild black hole using the infalling Gullstrand-Painlevé coordinates
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:14, 14 September 2021 |  | 363 × 363 (88 KB) | (username removed) |
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