At about what time after the Big Bang did the universe pass through the transition from a radiation-dominated to a matter-dominated universe? A)about 15 billion years, as stars began to form B)24,000 years C)380,000 years D)at the Planck time, 10^-43 s

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Quizplus · Accepted Answer

The transition from a radiation-dominated to a matter-dominated universe occurred approximately 24,000 years after the Big Bang. This transition marks the era when the density of matter surpassed the density of radiation, leading to the universe's structure being more influenced by matter.

At About What Time After the Big Bang Did the Universe