Mathlouthi Adel
In cosmology, the Planck era refers to the period in the history of the Universe during which the four fundamental interactions (electromagnetism, weak interaction, strong interaction and gravitation) were unified, that is to say -to say that they applied at the same time, which prevents it from being described using general relativity or quantum physics, since these theories are incomplete and are only valid when gravitation and quantum effects can be studied separately.
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