How Can we find a vaccuum in space? is time a vacuum is space also?

Question

Is space time a vacuum? Was ather that Einstein was talking about also a vacuum? did the big bang created a vaccum?

Answer 1

Responders who think there was a vacuum that the Big Bang expanded into appear to be in the majority. However, physics is not democratic.

Spacetime can exist either in a vacuum state, or it may contain matter. Vacuum is simply space time will all particles removed. All that is left are its dimensions: length, width, height, and the time that it remains evacuated. A perfect vacuum is not achievable in practice, so the concept is a theoretical ideal. It's not correct to equate spacetime with vacuum because adding particles to an evacuate region of spacetime destroys the vacuum, but only deforms the spacetime metric (the metric is the local rule for measuring its dimensions). The important thing to understand is that the dimensions of space-time (whether evacuated or not) are *properties*. So, the vacuum is not equivalent to nothing at all. Nothing has no properties. The Big Bang created spacetime (and, therefore, the capacity to create a vacuum) by inflating it from an unknown state or, perhaps, nothing at all. Whatever its properties (if any), the familiar dimensions of spacetime are not included among them

Answer 2

Vacuum is space itself with nothing in it. The Big Bang did NOT create a vacuum. Supposedly, there was vacuum there before the Big Bang (or it would not have been able to expand anywhere.)

As another way of looking at it, if there was only one particle in the universe, space would not be measurable, because we need to have two reference points between which to measure distance.

So, after the second particle came into existence, there was space, because now it could be measured. If the distance between the particles was changing, this defines time. Thus, the introduction of time predates the development of a second dimension.

But that was only space with one definable dimension, between two particles, approximating points (I am not discussing the quantum mechanics of it.)

Once a third particle (point) came into existence, the three points defined a triangle which is the simplest plane figure and two dimensions could be defined.

Once a fourth particle (point) came into existance, resulting in intersecting planes, there were three dimensions.

Answer 3

you find vacuum by measuring the absence of matter. Time is not a vacuum, it's an illusion because the universe has no beginning and no end.