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Unformatted text preview: Quantum mechanics is the description of the behavior of matter and light in all its details and, in particular, of the happenings on an atomic scale. Things on a very small scale behave like nothing that you have any direct experience about. They do not behave like waves, they do not behave like particles, they do not behave like clouds, or billiard balls, or weights on springs, or like anything that you have ever seen.Richard P. Feynman Introduction to Quantum Mechanics This week and the next are critical for the course Week 3 Lect. 5,6: Light as Particles  Particles as waves  WaveParticle Duality  Probability Uncertainty Principle  Weirdness of Quantum Mechanics Week 4 Lect. 7,8: Schrdinger Equation  Definite predictions of quantum behavior  Examples of particles in infinite wells, finite wells  Leads up to rest of course Midterm Exam Monday, Feb. 11  will cover Lectures 17 and qualitative aspects of lecture 8 Week 4 The discussion and the quiz will be on material in lecture 7 Week 4 Online homework covers material in lecture 7 due on Thur. Feb. 14, but we strongly encourage you to look at the homework before the midterm! Review Sunday, Feb. 10  office hours Feb. 10 and 11 Introduction to Quantum Mechanics This week and the next are critical for the course Week 3 Lect. 5,6: Light as Particles  Particles as waves  WaveParticle Duality  Probability Uncertainty Principle  Weirdness of Quantum Mechanics Week 4 Lect. 7,8: Schrdinger Equation  Definite predictions of quantum behavior  Examples of particles in infinite wells, finite wells  Leads up to rest of course Midterm Exam Monday, Feb. 11  will cover Lectures 17 and qualitative aspects of lecture 8 Week 4 The discussion and the quiz will be on material in lecture 56 Week 4 Online homework covers material in lectures 78 due on Thur. Feb. 14, but we strongly encourage you to look at the homework before the midterm! Review Sunday, Feb. 10  office hours Feb. 10 and 11 Introduction to Quantum Physics: Matter Waves de Broglies proposal and the Schrdinger Equation Overview Overview c Wave nature of particles c Proposed by DeBroglie in 1923 c Demonstrated by diffraction from crystals just like Xrays! c Matterwave Interference c Doubleslit interference pattern just like photons c Electron microscopy c Heisenberg Uncertainty Principle c Cannot measure position and velocity of a particle simultaneously c Implications for measurements in QM c Schrdinger Equation (SEQ) c Timedependent SEQ replaces F=ma (followup later) c Timeindependent SEQ gives static solutions for wavefunctions c Physical interpretation of the wavefunction Matter Waves Matter Waves c Prince Louis de Broglie (1923) proposed that particles also behave as waves; i.e., for all particles there is a quantum wave with frequency and wavelength given by...
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This note was uploaded on 09/12/2009 for the course PHYS 214 taught by Professor Debevec during the Spring '07 term at University of Illinois at Urbana–Champaign.
 Spring '07
 Debevec
 mechanics, Heisenberg Uncertainty Principle, Light

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