Exploring Gravitational forces via thought experiments

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• Donald Lynden-Bell, IoA
• Thursday 19 March 2015, 16:30-17:30
• Sackler Lecture Theatre, IoA (tea at 4:00 pm).

If you have a question about this talk, please contact Simon Hodgkin.

The accelerating universe is driven apart by the gravitational repulsion caused by the tension (negative pressure) of dark energy. I devise a series of thought experiments to illustrate how the gravity not of density but of stress works in General Relativity. I also illustrate the gravitational forces due to currents of energy, momentum, and angular momentum. There are strong analogies with the Lorentz forces in electromagnetism.

This talk is part of the Institute of Astronomy Colloquia series.

This talk is included in these lists:

• Cambridge Astronomy Talks
• Combined External Astrophysics Talks DAMTP
• Cosmology lists
• Cosmology, Astrophysics and General Relativity
• Institute of Astronomy Colloquia
• Institute of Astronomy Talk Lists
• Kavli Institute for Cosmology Talk Lists
• Priscilla
• Sackler Lecture Theatre, IoA (tea at 4:00 pm)

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