Why can't current theories describe what happened during the Planck era?
A)We do not yet have a theory that links quantum mechanics and general relativity.
B)We do not yet have a theory that explains how the universe underwent a rapid period of inflationary expansion.
C)We do not yet have a theory that links the weak and electromagnetic forces.
D)The Planck era was the time before the Big Bang, and we cannot describe what happened before the beginning of the universe.
E)We do not understand the properties of the antimatter that would have been produced at this time.

Question

Quizplus · Accepted Answer

The Planck era is the earliest period of the universe, immediately following the Big Bang, where the forces of the universe were unified. Current theories cannot describe what happened during this time because we lack a theory that unifies quantum mechanics (which describes the behavior of particles at very small scales) and general relativity (which describes gravity and the structure of the universe at large scales).

Why Can't Current Theories Describe What Happened During the Planck