Existence of Time
Does time exist before the existence of universe?
Time is what we (people) use to measure events that are not instantaneous. The two common measurements are for motion and for chemical reactions.
We agree on a universal time increment defined by an atomic clock.
Time is used in many equations in physics and chemistry.
We use this time increment to measure the velocity of light. That enables the definition of one meter. The measured velocity of light is important because it describes the velocity of light or the propagation of synchronized, perpendicular electric and magnetic fields so c is used in various equations in physics for energy.
Time is not a thing that exists as part of the universe. Time is our method for measuring events.
It is certainly not a dimension that one can move along. As an accurate mechanism for measurement time is always incrementing at an unvarying rate.
Time is a physical phenomenon. You would not be able to measure anything if time did not exist in the first place!
Time is a measurement. Everything was moving in the universe before we defined the unit of our measurement. We just defined how to measure that motion.
We created time as our measurement tool. Whether one says we created time is matter of semantics. Time is a tool we defined not a thing or a physical phenomenon that is part of the universe. The universe certainly did not create time which is a tool we created. Lines of latitude and logitude measure position and are not a physical phenomenon.
Another person's comment:
I believe that time requires "something". It requires something to happen, implying a beginning and an end. Even if it's just the nuclear decay of an element, then there is an event that then has a beginning and an end, thus, the arrow of time. I would guess that, before the big bang, if there was nothing, then there was not time.
The big bang sequence is an interesting invocation of time. Cosmologists describe the exact amount of time which elapsed between each step. They are using our current definition of time to describe events before humanity. We apply our measurement tool to describe time durations for events any where or at any time. Our time increment is our permanently fixed amount. We can propose any duration before the big bang which is negative time if the big bang is time zero.
believe that time requires "something". It requires something to happen, implying a beginning and an end. Even if it's just the nuclear decay of an element, then there is an event that then has a beginning and an end, thus, the arrow of time. I would guess that, before the big bang, if there was nothing, then there was not time.
OK. If the big bang happened at time of zero then if anything happened before the big bang then those events were at a negative time. Time is a measurement like temperature where we define where zero is and then we can get positive or negative values.
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