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LectureQ1 - Chapter Q1 Introduction to Quantum Mechanics...

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3/28/2004 H133 Spring 2004 1 Chapter Q1 Introduction to Quantum Mechanics End of 19 th Century only a few loose ends to wrap up. Led to Relativity which you learned about last quarter Led to Quantum Mechanics (1920’s-30’s and beyond) Behavior of atomic and subatomic world Newton’s Laws don’t hold Foundation of most Physics Research that occurs these days. Basic Ideas behind Quantum Mechanics Small Particles behave like waves Not localized Interference effects (…more soon) Observations alter the system. o Basic quantities x, p o In QM if you try to determine x you will effect p and visa versa. Implies bound systems have quantized states (Atomic Spectra) Waves (EM) behave like particles. We need to understand Classical wave first.
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3/28/2004 H133 Spring 2004 2 Classical Waves Basics Waves are a disturbance that travel in a medium. e.g. water waves Note: Particles in the medium are not traveling along with the wave. We will look at 1-D wave to begin. Two types of waves Tension Wave (sometime called transverse) e.g. wave on a string. Compress ional Wave (sometimes call longitudinal) e.g. sound wave Demo Equilibrium Position Tube
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