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Notice | How to Upload Pictures in webpages | 2016.07.06 | 운영자 | 2018.10.19 | 32217 |
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8837 | 육군 방첩대. 미군 CIC, 그리고 김창룡 | 2024.04.17 | 온기철*71 | 2024.04.17 | 9 |
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8835 | OPERA MIGNON: Connais tu le pays [1] | 2024.04.12 | 정관호*63 | 2024.04.12 | 15 |
8834 | “쏘니,너와 함께 뛴건 행운!”, 400경기 감동 축하영상 [4] | 2024.04.06 | 황규정*65 | 2024.04.08 | 26 |
8833 | 길에서 만난 한식 [1] | 2024.04.03 | 정관호*63 | 2024.04.09 | 26 |
8832 | 돌아오는 기러기 [1] | 2024.03.27 | 정관호*63 | 2024.04.18 | 39 |
8831 | 이강인-손흥민 ‘골 합작’ 한국, 태국 3-0 완승…월드컵 최종 예선 진출 성큼 [2] | 2024.03.26 | 황규정*65 | 2024.03.27 | 36 |
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8829 | 이승만은 왜 김구를 제거 했을까? [1] | 2024.03.17 | 온기철*71 | 2024.03.18 | 46 |
8828 | My Grandson [1] | 2024.03.15 | 노영일*68 | 2024.03.18 | 99 |
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8825 | 왕소군 고향에서 [1] | 2024.03.08 | 정관호*63 | 2024.03.20 | 52 |
8824 | 정약용; 늙어가면 친구가 점점 없어진다. [5] | 2024.03.06 | 온기철*71 | 2024.03.08 | 80 |
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8822 | AMAZING GRACE [1] | 2024.03.01 | 정관호*63 | 2024.03.08 | 64 |
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The no-hair theorem postulates that all black hole solutions of the Einstein-Maxwell equations of gravitation and electromagnetism in general relativity can be completely characterized by only three externally observable classical parameters: mass, electric charge, and angular momentum.[1] All other information (for which "hair" is a metaphor) about the matter which formed a black hole or is falling into it, "disappears" behind the black-hole event horizon and is therefore permanently inaccessible to external observers. Physicist John Archibald Wheeler expressed this idea with the phrase "black holes have no hair"[1] which was the origin of the name. In a later interview, John Wheeler says that Jacob Bekenstein coined this phrase.[2]
The first version of the no-hair theorem for the simplified case of the uniqueness of the Schwarzschild metric was shown by Werner Israel in 1967.[3] The result was quickly generalized to the cases of charged or spinning black holes.[4][5] There is still no rigorous mathematical proof of a general no-hair theorem, and mathematicians refer to it as the no-hair conjecture. Even in the case of gravity alone (i.e., zero electric fields), the conjecture has only been partially resolved by results of Stephen Hawking, Brandon Carter, and David C. Robinson, under the additional hypothesis of non-degenerate event horizons and the technical, restrictive and difficult-to-justify assumption of real analyticity of the space-time continuum.(from Internet)