A new method of solving the Einstein–Friedmann dynamical equations of a spatially homogeneous and isotropic universe is presented. The method is applicable when the equation of state of the material content assumes the form γ=constant. The solution for the expansion factor is commonly given only for γ=0, 1, and 4/3 when the curvature index is The proposed procedure is valid for general γ and K and it allows for ease of derivation of the solutions. This alternative method is useful pedagogically to introduce basic cosmology.
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© 1999 American Association of Physics Teachers.
1999
American Association of Physics Teachers
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