Quantum Weirdness 104: Heisenberg’s Uncertainty

“Doubt is unpleasant, but certainty is ridiculous.”–Voltaire

Heisenberg may be dead, but his uncertainty principal is alive and kicking.
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It was the end of the Newtonian worldview.   Early in the 20th century relativity and quantum mechanics created a new scientific outlook on reality–counter-intuitive and downright….well…weird.  The final nail in the coffin of so-called Newtonian determinism was put forth by one Werner Heisenberg in 1927: the uncertainty principle.   Simply stated, you can’t exactly know both the momentum and location of a quantum object.  The more precisely you know one, the less precisely you know the other.   And while recent news headlines suggest to some that Heisenberg has been overturned, this is absolutely NOT the case.   It was thought that the very act of measuring a quantum particle added to the uncertainty, but that was never really part of Heisenberg’s equation–which in fact can also apply to macroscopic phenomena like sound and water waves.  So while a team from the University of Toronto was able to devise a means to measure a quanta (such as an electron or photon) with minimal increase in uncertainty, even they admitted “the quantum world is still full of uncertainty, but at least our attempts to look at it don’t have to add as much uncertainty as we used to think!”

Heisenberg’s principle plays a critical role in something that is rather significant in the foundations of modern philosophy, and as I see it, civilization itself.  That would be how we view the future.  This will be explained in the next conjecture.

Here is a simple video demonstration of the concept by Walter Lewin of MIT–a single-slit experiment.

If you’re brave enough to tackle the math, here is a link to another video from Mind Bites that explains it in terms so simple even I can understand it.  Er…maybe.

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