Planck time
Planck time is the smallest measurable unit of time in physics, defined as approximately \(5.39 \times 10^{-44}\) seconds. It represents the time it takes for light to travel a tiny distance equal to the Planck length, which is about the size of subatomic particles. At this scale, the effects of quantum mechanics and gravity become significant, and conventional ideas of space and time may not apply. Planck time is crucial in theories that attempt to unify quantum physics and general relativity, helping scientists understand the early moments of the universe after the Big Bang.
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Planck time is the smallest measurable unit of time in the universe, approximately 5.39 x 10^-44 seconds. It represents the time it would take light to travel a small distance, defined by the Planck length—the scale at which classical ideas of gravity and space-time break down. At this incredibly tiny scale, quantum effects dominate, and our current understanding of physics becomes less reliable. Planck time is a fundamental concept in theories of quantum gravity and helps scientists explore the early moments of the universe, such as during the Big Bang.