As far as I understand, the Heisenberg uncertainty principle states that the more one of the conjugate quantities are known, the less the other is known. So for instance, if the velocity of a particle is known more precisely, its location will become known less precisely.
I also read somewhere that it's because if you direct some ray at the moving particle, the ray will reflect, giving the former position of the particle, but the whole collision between the ray and the particle changes the particle's momentum, thus only one can be measured at a time which is the Heisenberg uncertainty principle.
In that case, if there is an indefinitely precise measuring device that can detect the particle's position and velocity at the same time, can the Heisenberg uncertainty principle disproved?
Also, does the Heisenberg uncertainty principle apply only to subatomic particles, or large objects too?
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1The uncertainty referred to in the Heisenberg Uncertainty Principle is intrinsic; it represents the limit of what a perfect measuring device would be able to do. – probably_someone Mar 13 '18 at 22:36
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2Possible duplicate of Isn't the uncertainty principle just non-fundamental limitations in our current technology that could be removed in a more advanced civilization? – Red Act Mar 13 '18 at 22:43
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The HUP is a purely mathematical consequence of the basic assumptions of quantum mechanics. Your arguments would apply equally well (or poorly) to classical mechanics, but classical mechanics has no HUP, so your arguments cannot be right. See my answer here for more: https://physics.stackexchange.com/a/386894/4993 – WillO Mar 13 '18 at 22:47