After the Big Bang,as the universe cooled and protons and electrons combined so that the universe become neutral,what important consequence happened?
A) Photons began to travel freely through the universe.
B) Neutrinos ceased to interact with normal matter.
C) Dark matter ceased to interact with normal matter.
D) Protons and neutrons combined to form nuclei such as deuterium and helium.

Question

Quizplus · Accepted Answer

As the universe became neutral, photons were no longer absorbed and scattered by charged particles. This allowed them to travel freely through the universe and form the cosmic microwave background radiation, which we can still detect today.

After the Big Bang,as the Universe Cooled and Protons and Electrons