What is the significance of the Planck time?
A) Before it, conditions were so extreme that our current understanding of physics is insufficient to predict what might have occurred.
B) It is the time at which inflation is thought to have occurred.
C) It is the time when the cosmic microwave background was released.
D) It is the amount of time required for two protons to fuse to make deuterium.

Question

Quizplus · Accepted Answer

The Planck time is the shortest theoretical interval of time that can be measured or defined in the universe, roughly equal to 5.39 x 10^-44 seconds. Before this time, the universe was in a state of extreme density, heat, and energy, where our current understanding of physics is insufficient to predict what might have occurred. Therefore, the significance of the Planck time is that it represents a fundamental limit to our understanding of the early universe.

What Is the Significance of the Planck Time