At what point do the weak nuclear and electromagnetic forces split?
A) never, they are still united
B) at 10¹² K, when pair production starts for neutrons and protons
C) at 10⁻⁴³ seconds, when all four forces separate as the Planck Era ends
D) at about four seconds, when at millions of degrees hydrogen forms helium
E) after about 10⁻¹⁰ seconds, when the temperature drops below 10⁻¹⁵ K

Question

Quizplus · Accepted Answer

The weak nuclear and electromagnetic forces split after about 10⁻¹⁰ seconds, when the temperature drops below 10¹⁵ K, during the electroweak epoch.

At What Point Do the Weak Nuclear and Electromagnetic Forces