Sci 17 - Class 17 Thursday, May 29, 2008 12:37 PM Niels...

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Class 17 Thursday, May 29, 2008 12:37 PM Niels Bohr Electron-Atom (1915) Bohr model of hydrogen atom Before, The paradigm of physical world lent itself to preferred rationalistic view of metaphysical paradigm 1600's on Mechanical physics propels rationalistic understand of society Looks to nature and understand of it and LAWS Less supernatural More scientific disciplines Now, science which was mechanistic, very solid Einstein says time is relative Energy? What is it? We're not sure what it is Now the 20th century is throwing everything into chaos Center of the atom is a proton
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This electron is a packet of energy It's a particle But contians a spec. amt of enery This is how energy and matter are interchangeable Exchanges at the quantum level Broglie says Probability wave We don’t' even know WHERE the electron is, but we can tell you, likely where it is in terms of energy state Unfortunately, scientists at the time really don't like this Because it means they can't control it, they can' tbe absolutely certain They also don't know why this happens Heisenberg uncertainty principle It's hard This probabilty at its heart, uncertain You can never determine where it is exactly Nor can you understand its momentum mm The good thing is, god and mind has nothing to do with our inability to figure it out It's our instruments
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OR Copenhagen interp It's a wave AND a particle, both The reason we can't determine it is something, is because its both things at the same time Bohr and Heisenberg's new atom Bohr embraces radical implication of theory "the hidden variable" is not unobservable but the act of obersvation itself Wave "collapse" into particle event does not eliminate the reality of the wave It is fundamentally boht a wave and a particle. IE probablility is a structurenot a contingency The very act of observing, collapses the wave, it doesn't CEASE being a wave, but the act of
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This note was uploaded on 06/04/2008 for the course HIST 2D taught by Professor Raia during the Spring '08 term at UCLA.

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Sci 17 - Class 17 Thursday, May 29, 2008 12:37 PM Niels...

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