The Black Hole Science that Won a Nobel Prize
Rob Lea, October 16, 2020
Sir Roger Penrose has been awarded the 2020 Nobel Prize in physics for his work revolutionising our theories regarding black holes and eshaping general relativity.
/ The basis of Sir Roger Penrose construction are: General relativity + Black holes + Lightcones /. . . / Lightcones: A Physicist's Favorite Tools /
- '' A light cone is most simply described as the path that a flash of light created by a single event and travelling in all directions would take through spacetime. Light cones can be especially useful when it comes to physicists calculating which events can be causally linked. If a line can’t be drawn between the two events that fits in the light cone, one cannot have caused the other.''
- '' Penrose considered what would happen to a light cone as it approached and passed the event horizon of what is known as a ‘Kerr black hole.’ This is a black hole that is non-charged and rotating. Its angular momentum drags spacetime along with it in an effect researchers call frame dragging.''
- '' So as our light cone moves toward the event horizon, it begins to narrow and tip. But, something extraordinary happens when it passes this boundary. As long as one is using so called Swartzchild coordinates, once ‘inside the black hole’ proper, the lightcone flips on its side, with the ‘future end’ of the cone pointed towards the singularity. ''
- '' Thus, what Penrose’s Nobel award can really be seen as a recognition of moving these objects — or more accurately, spacetime events — from the realm of speculation to scientific theory.''
''Sir Roger Penrose has been awarded the 2020 Nobel Prize
in physics for his work revolutionising our theories regarding
black holes and reshaping. . . '' . . . Lightcones (!)
What is really light cone? Nobody knows . . .
What is really Minkowski 4D ? Nobody knows . . .
Sir Roger Penrose created pure mathematical construction
Alfred Nobel did not bequeath his Prize for mathematical works.