Frontiers in Physics Colloquium
Gravity of Circulating Light: A New Twist in Space and Time
Professor Ronald L.
Department of Physics
University of Connecticut
n this talk I will give a brief history of time travel within the framework of Einstein's special and general theory of relativity. This will be followed by a discussion of my research on the weak and strong gravitational fields created by a continuously circulating unidirectional beam of light. For the weak gravitational field of a light beam in a ring laser, I will discuss my prediction of a space twisting effect called frame dragging. For the strong gravitational field of a circulating cylinder of light, I will show that closed loops in time can be generated. The presence of closed loops in time indicates the possibility of time travel into the past. Problems and paradoxes of time travel will be discussed.
Friday, July 11, 2003
(Refreshments will be served beginning at 3:30 in the Physics Library, Room P-103)