# If we consider a hypothetic universal time/clock independent from the laws of physics, can we say the time won't be relative if that clock is used? [closed]

If we have such a clock and we use it to travel to a back hole and stay there for say 24 universal hours and we come back to the earth, is the passed time exactly the same on earth according to that clock?

I am trying to understand whether the time we refer to in physics is somehow related to the life/vibration/movement of the quantum particles.

Some people reported my question as off-topic. This is not off topic and I'm not talking about a new theory of my own!! I am trying to understand the concept of time in physics.

People who keep talking about my hypothetical clock they don't understand my question. It's not about the clock, it's just a hypothetical clock to understand something else.

My question is about having a clock with different rate as opposed to atomic clock.

So if an astronaut and his brother have the same type of clock, would they still experience different time relative to each other?

I understand that the astronaut is made off cells which is made off quantum particles so yes his body will definitely experience a slowed-down time relative to his brother.

However, my question is more about the measure of that time. So for example, we said every 60 oscillation of pendulum is 1 minute. Now this measurement can vary according to relativity in different location or at different speed, so now if our clock is not based on the local elements, would that be used as a universal clock (regardless of what the body of the astronaut is experiencing)?

• What do you mean independent from the laws of physics? Sep 4, 2020 at 5:55
• A clock that is independent from the laws of physics can do anything it wants to. Sep 4, 2020 at 6:03
• Also: Your clock is going to have to be pretty magical indeed if it registers the time passed on earth while it was off vacationing at a black hole. Sep 4, 2020 at 6:06
• Also: There was relativity before there was quantum physics, so no, the time we study in relativity can't depend on anything to do with quantum particles. Sep 4, 2020 at 6:07