Temperature of the universe cools down to 3000K. This reduces the energy of electrons so they bind to the nucleus and first atoms are created.
Photons become free to move around and light is observed.
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Apr 16, 20251 min read
Temperature of the universe cools down to 3000K. This reduces the energy of electrons so they bind to the nucleus and first atoms are created.
Photons become free to move around and light is observed.