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Originally Posted by dipayankar  By the way Prof., what makes time (or the measurement) dilate with rise in velocity? |
Hello Dipayankar,
Due to how I view our universe, we have two forms of time, because we have two instances of motion/velocity. We have the individual absolute motions/velocities of the fundamental builders (particles) and we have their collective motion/velocity when they become dense enough (massive object) to collectively move through a less dense medium of fundamental builders, whereby the individual particles that form the massive object are still moving in random directions (frequency) within the space they occupy, but the whole collection (massive object) is moving uniformly in one direction. It is the essence of this duality of directions that allows for size (proximity of particle to particle) to be relative to collective linear motion/velocity.
In my opinion, there is universal time, which is absolute and is a measurement of the distance traveled at any given interval of the fundamental particles of matter in absolute motion/velocity, and then there is our mechanical measurement of time, which is seen by a pendulum (massive object) swinging. Mechanical time is a measurement taken by the uniform motion/velocity of a massive object, as seen by the pendulum, but being as the pendulum is made up of a collection of particles and their proximity to each other is relative to their collective motion/velocity, so too is their overall dimensions. Thus, if a change in collective motion/velocity also changes their overall dimensions, then mechanical time is therefore relative to collective motion/velocity, but universal time is absolute due to the absolute motion/velocity of the fundamental particles.
Thus, the entire motion/velocity of a closed universal system is finite and absolute, and gives rise to true time. It is merely the measurable dimensions of massive collections of particles that fluctuate as an effect of their collective linear motion/velocity.
This is just how I see things. That doesn't make it right. I only hope it makes sense.