Quote:
Originally Posted by MuddyBoots
...everything is always in flux...and when I mean everything I mean EVERYTHING. My backpack next to me? "Hasn't changed" or moved or anything from my perspective, but is it the same? I'll still call it my backpack and won't say it's moved, but is that right beyond practicality?
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Muddy, it depends on your frame of reference. If your frame of reference is at the atomic level then you're right, the backpack and everything else is always in flux and we have the physics to back up this concept.
But if your frame of reference is at your own level then the backpack remains a backpack because we are looking at it based on that frame of reference. So in other words, the backpack is and always will be a backpack because the scale if your frame of reference is at that level.
If you look at bigger frames of reference, or maybe the frame of reference from the point of view of a photon of light traveling through space, then things will change significantly.
So it's all relative as Einstein would say.
So to keep yourself sane, stick to one frame of reference - your own - and only sometimes go to other frames when you feel up to it.
Frame of reference - Wikipedia