Within which time frame from the initial Big Bang do we believe all four fundamental forces of nature were united into a single force?

Question

Quizplus · Accepted Answer

The event when all four fundamental forces of nature were united into a single force is known as the Grand Unification Epoch. It occurred during the Planck time, which is roughly 10-⁴³ seconds after the Big Bang. At this time, the universe was incredibly dense and hot, and the energy that unified the four forces was so intense that the laws of physics as we know them today do not apply. Gradually, as the universe expanded and cooled, the four forces began to separate and become distinct. Therefore, option D is the only correct choice as it refers to the correct time frame.

Within Which Time Frame from the Initial Big Bang Do