Radiation-Dominated Era

Radiation-Dominated Era

The Radiation-Dominated Era refers to one of the three phases of the known universe, the other two being the Matter-Dominated Era and the Dark Energy Dominated Era. The Radiation-Dominated Era occurred from 3 seconds after the universe's creation until it was about 380,000 years old. The era is marked by radiation being the dominant form of energy in the universe.

For a radiation dominated universe the evolution of the scale factor in the Friedmann-Lemaitre-Robertson-Walker metric is easily obtained solving the Friedmann equations:

:a(t)propto t^{1/2}


Wikimedia Foundation. 2010.

Поможем написать реферат

Look at other dictionaries:

  • Matter-Dominated Era — The Matter Dominated Era was the epoch in the evolution of the Universe that began after the Radiation Dominated Era ended, when the Universe was about 380,000 years old. Although it was often said that we still live in the Matter Dominated Era,… …   Wikipedia

  • Matter-dominated era — The matter dominated era was the epoch in the evolution of the Universe that began after the radiation dominated era ended, when the Universe was about 70,000 years old. Although it was often said that we still live in the matter dominated era,… …   Wikipedia

  • Dark Energy Dominated Era — The Dark Energy Dominated Era refers to one of the three phases of the known universe, the other two being the Matter Dominated Era and the Radiation Dominated Era. The Dark Energy Dominated Era began after the Matter Dominated Era, i.e. when the …   Wikipedia

  • Dark-energy-dominated era — The dark energy dominated era refers to one of the three phases of the known universe, the other two being the matter dominated era and the radiation dominated era. The dark energy dominated era began after the matter dominated era, i.e. when the …   Wikipedia

  • Cosmic microwave background radiation — CMB and Cosmic background radiation redirect here. For other uses see CMB (disambiguation) and Cosmic background (disambiguation). Physical cosmology …   Wikipedia

  • Jean-Pierre Petit — (b. 5 April 1937) is a French scientist, senior researcher at National Center for Scientific Research (CNRS), now retired. His main working fields are fluid mechanics, kinetic theory of gases, plasma physics, magnetohydrodynamics power generation …   Wikipedia

  • Variable speed of light — The variable speed of light (VSL) concept states that the speed of light in a vacuum, usually denoted by c , may not be constant in some cases. In most situations in condensed matter physics when light is traveling through a medium, it… …   Wikipedia

  • cosmos — /koz meuhs, mohs/, n., pl. cosmos, cosmoses for 2, 4. 1. the world or universe regarded as an orderly, harmonious system. 2. a complete, orderly, harmonious system. 3. order; harmony. 4. any composite plant of the genus Cosmos, of tropical… …   Universalium

  • Universe — For other uses, see Universe (disambiguation). Physical cosmology …   Wikipedia

  • Inflation (cosmology) — Inflation model and Inflation theory redirect here. For a general rise in the price level, see Inflation. For other uses, see Inflation (disambiguation). Physical cosmology …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”