Dark Matter Energy Content

  • #1
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Main Question or Discussion Point

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?
 

Answers and Replies

  • #2
Chalnoth
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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?
There's about five times as much mass in our universe in dark matter as there is in normal matter.
 
  • #3
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Ok thanks. She should have said something more like "Dark matter accounts for five sixths of the total massenergy content of the universe."
 
  • #4
Chalnoth
Science Advisor
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Ok thanks. She should have said something more like "Dark matter accounts for five sixths of the total massenergy content of the universe."
No, that's not an accurate statement, as there's also dark energy. Her statement was accurate as-is.
 
  • #5
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I thank you for your original answer, which makes perfect sense.
 

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