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Homework Help: Energy density of the cosmological constant units question

  1. Jun 15, 2014 #1
    Hi Everyone!

    I need a bit of help with the following question please.

    How does the energy density of the cosmological constant Uλ=ρλc^2 have the required SI units if λ=4∏Gρ/c^2

    I know that the energy density of the cosmological constant (Uλ)is essentially dark energy and the SI units of energy density is Jm^-3. I also know that G is the gravity constant 6.67 x 10^-11 Nm^2kg^-2 and ρ is the energy density of matter. However, I am confused about the units.

    Any help would be appreciated.
  2. jcsd
  3. Jun 18, 2014 #2
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