The Crossover Point from Radiation to Matter Domination Occurred:
A)when $16,000 \mathrm {~K}.$

question 45

Multiple Choice

The crossover point from radiation to matter domination occurred:

• A)when the strong force separated from the other two forces.
• B)with the emission of the cosmic background radiation.
• C)about 50,000 years after the Big Bang, at a temperature of about \(16,000 \mathrm {~K}.\)
• D)with the creation of neutrons and protons, at about \(10^{13} \mathrm {~K}\)
• E)with the creation of electrons and positrons at about \(6 \times 10 ^ { 9 } \mathrm {~K}\)

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