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SUMMARY:Exploring Gravitational forces via thought experiments - Donald Ly
 nden-Bell\, IoA
DTSTART:20150319T163000Z
DTEND:20150319T173000Z
UID:TALK57141@talks.cam.ac.uk
CONTACT:Simon Hodgkin
DESCRIPTION:The accelerating universe is driven apart by the gravitational
 \nrepulsion caused by the tension (negative pressure) of dark energy.\nI d
 evise a series of thought experiments to illustrate how the\ngravity not o
 f density but of stress works in General Relativity.\nI also illustrate th
 e gravitational forces due to currents of energy\,\nmomentum\, and angular
  momentum. There are strong analogies with the Lorentz forces in electroma
 gnetism.
LOCATION:Sackler Lecture Theatre\, IoA (tea at 4:00 pm)
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