CHEM 1150 Lecture Notes - Uncertainty Principle
Dr. Quantum: The Double Slit Experiment
https://www.youtube.com/watch?v=Q1YqgPAtzho
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Particles like waves, interferences pattern via e- leaving as particle,
becoming wave of potentials and interfering w/ itself to become particle
and hit wall
But mathematically stranger b/c go through one slit, both, neither,
possibilities endless
§
So peeked by putting measuring device by one slit, but quantum
world far more mysterious; and very act of measuring, or observing,
made e- go back to acting like just particles (as if knew being
observed)
So observer collapsed wave function simply by observing
□
§
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Is this what quantum mechanics looks like? (Veritasium)
https://www.youtube.com/watch?v=A9tKncAdlHQ
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Central mystery of quantum mechanics: 2 split mechanics
Light has to be monochromic (one wavelength)
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When unplug equipment to spy on atoms, they go back
to wave behavior
§
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The Heisenberg Uncertainty Principle (Verisaium )
When narrow laser through slit on wall, spot widens
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Delta x(position of particle in horizontal direction) times delta p
(uncertainty in momentum) is greater than or equal to (h [plank's
constant]/ 4 pi)
As narrow slit, decrease delta x for photons, so more and more
precise about where sending then, and after a certain point break
this uncertainty relationship
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So this is why as narrow slit (so photons going to the left and to the
right produce a wider beam), delta p (uncertainty in momentum)
increases (inverse relationship)
§
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Videos on Quantum Mechanics
Sunday, April 1, 2018
8:14 PM
Document Summary
Particles like waves, interferences pattern via e- leaving as particle, becoming wave of potentials and interfering w/ itself to become particle and hit wall. But mathematically stranger b/c go through one slit, both, neither, possibilities endless. So peeked by putting measuring device by one slit, but quantum world far more mysterious; and very act of measuring, or observing, made e- go back to acting like just particles (as if knew being observed) So observer collapsed wave function simply by observing. Is this what quantum mechanics looks like? (veritasium) https://www. youtube. com/watch?v=a9tkncadlhq. Central mystery of quantum mechanics: 2 split mechanics. When unplug equipment to spy on atoms, they go back to wave behavior. When narrow laser through slit on wall, spot widens. Delta x(position of particle in horizontal direction) times delta p (uncertainty in momentum) is greater than or equal to (h [plank"s constant]/ 4 pi)
