sloughter said:While Planck time is usually regarded as the shortest unit of time,
Vanadium 50 said:It's not, which means the whole rest of the question follows from a faulty premise.
mfb said:What do you mean with "absolute time" and "local time"?
And how is that related to the shortest meaningful unit of time today?
It is the shortest time interval where our current physics could be valid. We don't know what happens at shorter time intervals.sloughter said:In some sources like Wikipedia, Planck's time is regarded as the shortest unit of time.
That question just does not make sense.If we assume that the Big Bang was absolute time was Planck's epoch the start of local time i.e. dependent upon the observer?
Absolute time is a theoretical concept in physics that refers to the precise and unchanging measurement of time in the universe. It is often described as a universal clock that is independent of any external factors or reference frames.
Local time refers to the measurement of time in a specific location or reference frame. It is relative to the observer's position and can vary depending on factors such as speed and gravity. This concept is a fundamental aspect of the theory of relativity.
Planck time is the smallest unit of time that can be measured, according to current theories in physics. It is approximately 5.39 x 10^-44 seconds and is named after the physicist Max Planck. At this scale, traditional concepts of time and space break down and the laws of physics as we know them may no longer apply.
Absolute time and local time are used to describe different perspectives of time, with absolute time being the overarching concept and local time being relative to specific frames of reference. Planck time is a much smaller unit of time that is believed to be the limit of our ability to measure time. It is also used in theories that attempt to reconcile the laws of physics at the smallest scales.
While absolute time, local time, and Planck time may seem purely theoretical, they have important implications in various fields of science, such as cosmology, quantum mechanics, and relativity. Understanding these concepts can help us better understand the fundamental nature of our universe and may lead to advancements in technology and our understanding of time itself.