What is time?.is time different in a non inertial field than inertial field in the Universe?

Answer 1

Time is another dimension of the real world - Think of it like this:
Length, Heighth, and Width are easy to see - They provide solid reality. TIME is a fourth dimension and exists orthogonally to the first three (that means at 90 degress to) - If you know what a tesseract is, that's a pretty good way to think of it.

Time can be distorted, just like distance and just like mass. You'll recall that according to Einstein (and proven in partical experiments), time, mass, and length change as velocity increases - relative to a motionless observer. The equation for this is The Lorentz Factor (a multiplier) = 1/(Sqrt(1- V^2/C^2)) where V is the velocity of the object, and C is the speed of light in a vacuum.

So, if I take the second part of your question correctly, yes, time IS different in an inertial field (What do you mean by this, exactly?).

You can think of time as being an always positive vector - at least we haven't found a way to reverse the direction yet.

Orion

Answer 2

Time is what keeps everything happening at once.

Time is the independent coordinate in the space-time equations.

Time is the same at every point in the universe. However, when you, in an inertial field, OBSERVE events someplace else (which could be in a non-inertial field), you will observe a different time. And also if you are in a non-inertial field.

To put it another way, it always looks to you like you are normal, and the rest of the universe is out of step. And it looks that way to everybody else in the universe also.

Answer 3

Time can be defined in various ways...Time can be relative to the motion of celestial bodies (such as day and night from Earth's rotation), Time could be based on a standard measurement, such as a second or hour. However, time is often defined in science to be a component of the space-time continuum, a Universal reference.

For instance, you could look at a star 1 light-year away, and see that star as it was one year ago. This doen't mean that you are actually going back in time, but using light as a reference to time, which is the amount of time it takes for light to travel in one year.

Time travel is actually an everyday occurance...as each day passes, we are travelling forward in time! However, we are only going in one direction in time.