Dr. Penrose transparency explaining black holes. Among his contributions in this area are: 1964 - Dr. Penrose proves that an imploding star will necessarily produce a singularity once it has formed an event horizon. In general relativity, an event horizon is a boundary in spacetime, most often an area surrounding a black hole, beyond which events cannot affect an outside observer. 1969 - Dr. Penrose discusses the Penrose process for the extraction of the spin energy from a Kerr black hole. The Penrose process was theorised by Roger Penrose wherein energy can be extracted from a rotating black hole. 1969 - Dr. Penrose proposes the cosmic censorship hypothesis. The weak and the strong Cosmic Censorship Hypotheses are two mathematical conjectures about the structure of singularities arising in general relativity.
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