lecture_201_2

lecture_201_2 - PHYS 2O1-PHYSICS III Week 2 Course and Lab...

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Week 2 PHYS 2O1-PHYSICS III
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9/28/2011 Drexel University, Dr. A. Aprelev, week 2 Course and Lab Director: Prof. A .Aprelev Office: Disque 924, Email: [email protected] Phone: 215-895-2716, Fax: 215-895-5934 Office Hours: Monday and Wednesday: 16:00 pm-17:00 pm or by appointment Lab Sessions in Disque 820A Textbooks: PHYSICS FOR SCIENTISTS AND ENGINEERS: by R.A. Serway and John W. Jewett, Jr. , 8 th edition. Brooks/Cole Publishers, with required access to WebAssign Online Available: CengageBrain.com/Campus Bookstore PHYSICS Lab Manual by R. Ramos and S. Tyagi, Pearson/Addison Wesley.
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9/28/2011 Drexel University, Dr. A.Aprelev, week 2 3 Course Objective: An understanding of the basics of oscillatory motion and propagation of mechanical waves and electromagnetic waves in vacuum and material medium An understanding of the nature of light, phenomena of interference and diffraction An understanding of the basics of special theory of relativity, mass-energy equivalence An understanding of the basics of quantum physics including energy quantization, Bohr model of hydrogen atoms, particle-wave description, photons and matter waves, The Schrödinger equation and simple applications Syllabus: The course covers chapters 15, 16, 18, 35, 37-42 of the textbook. Reading assignments for the lectures and the problems for recitations are listed on the Course Syllabus.
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1. Lets consider coupled oscillators 2. endless chain of them 3. Imagine each them very small but density of them is very high So Total mass/Length (Area, Volume) is constant. The bump will propagate! It is exactly mass spring model. 9/28/2011 Drexel University, Dr. A.Aprelev, week 2 4 Trick to better understand waves (not from our book)
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Wave Motion chapter 16 (p. 466) 9/28/2011 Drexel University, Dr. A.Aprelev, week 2 5 “propagation of disturbance” (def) Matter may oscillate, but does not propagate Mechanical waves: Sound Water waves Seismic Heat Electromagnetic (field -no matter): IR Visible Light UV X-Rays Gamma rays Gamma-ray image of a truck with two stowaways
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1 . Medium containing elements that can be disturbed 2. Some physical mechanism through which elements of the medium can influence each other 3. Some source of disturbance 9/28/2011 Drexel University, Dr. A.Aprelev, week 2 6 “propagation of mech. energy” Matter may oscillate, but does not propagate. Chain of pendulums (torsional) connected with springs. Spring/block chain Stretched Rope or chain Transverse Longitudinal Different types: Sound in Water or gas ( longitudinal only ) Sound in solids (both) Different media: So naturally, can be modeled by:
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9/28/2011 Drexel University, Dr. A.Aprelev, week 2 7 Pulse on a String (easy to show, complex to analyse) The wave is generated by a flick on one end of the string.
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This note was uploaded on 10/07/2011 for the course PHYS 201 taught by Professor Bose during the Fall '08 term at Drexel.

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lecture_201_2 - PHYS 2O1-PHYSICS III Week 2 Course and Lab...

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