The discussion revolves around the interpretation of a statement made by scientist Lisa Randall regarding the energy content of dark matter in relation to ordinary matter. Participants explore the implications of this statement, including its relation to concepts like mass-energy equivalence and dark energy.
Participants express differing interpretations of Randall's statement, with some supporting her original phrasing while others suggest alternative formulations. The discussion remains unresolved regarding the precise implications of dark matter's energy content.
The discussion highlights potential ambiguities in the definitions of energy types and the relationship between dark matter and dark energy, which are not fully explored or resolved.
There's about five times as much mass in our universe in dark matter as there is in normal matter.DLSieving said:What is meant by the statement by Harvard scientist Lisa Randall that dark matter carries five times the energy of ordinary matter? Does E=mc2 not apply to dark matter? Does the statement refer to ordinary energy or to dark energy?
No, that's not an accurate statement, as there's also dark energy. Her statement was accurate as-is.DLSieving said:Ok thanks. She should have said something more like "Dark matter accounts for five sixths of the total massenergy content of the universe."