Is inertial time equivalent with non-inertial time in the Universe?

Answer 1

What do you mean by "inertial time"? "non-inertial time"? And "equivalent"?

At any one place, time is just time. A clock at that place will count out time -- it doesn't care about inertia, acceleration, gravity, etc. The clock might be a regular electric clock, or a human body, or anything that changes with time. (This is for clocks that are small enough that super heavy acceleration or gravity doesn't smash them.)

The weirdness of relativity comes when you are at one place, and you *look* at a clock at another place. Especially if you and the clock are moving or accelerating toward or away from each other, or there is a heavy object (like a star) close to the line that light takes getting from the clock to you.

So maybe an interesting question to ask is, are constant velocity clocks (inertial) equivalent to accelerated (non-inertial) clocks, for an observer who is not at the clock's location? And the answer is, no.

Answer 2

NO...According to inertial time ..time is constant.. i.e, it doesn't accelerate decelerate ,it keeps it self constant..But according to Einstein this is wrong..the time always varies