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Clock 1 in the inertia reference frame
Clock 2 in dilation on an aeroplane
Quote from: TheBoxClock 1 in the inertia reference frameThere is not a single "inertial" reference frame, there are many. And Einstein suggested that any inertial frame is just as valid as any other inertial frame.If you take two observers in two different inertial frames, they may disagree about how long things took, or in what order they occurred, if they occurred in different places. So some observers may see the two objects being dropped at the same instant, while others with think one (or the other) dropped first. Similarly, some observers will think that one (or the other) hit the ground first.So the observers will not know when to start and stop their clocks.This is the problem of simultaneity, see: https://en.wikipedia.org/wiki/Relativity_of_simultaneityNote: As I understand it, someone standing on the ground is not in an inertial frame of reference, because the ground is pushing up on their feet and/or seat.QuoteClock 2 in dilation on an aeroplaneHow do you know that the clock on the plane will be running slowly?It is true that a clock traveling quickly at ground level will seem to be running more slowly.But planes normally travel very high, so they are farther out of Earth's gravitational field, so the clock in the plane should run faster than the clock on the ground. Whether the clock on the plane is running faster or slower than one on the ground depends on what speed, and at what altitude.After you get your head around that, perhaps we can talk about the "twin paradox"? As I understand it:Someone on the ground, near the dropping balls will see the clock on the fast plane running slow.Someone on the fast plane, looking at the person on the ground will see the clock on the ground running slow. Which clock is really running slow?See: https://en.wikipedia.org/wiki/Twin_paradoxEinstein says it doesn't matter. Time is all relative anyway. Get over it.
causing an imaginary age difference. They aged the same ......
Experimental evidence shows otherwise.
when are we ever not falling?
Quote from: TheBoxwhen are we ever not falling?When we are asleep on our beds. We have to wake up every so often and turn over to get comfortable, because the bed is pushing up on us.Astronauts on the ISS are falling. You can tell because they are in microgravity.