Phy107HE3Review_6per

Phy107HE3Review_6per - Hour Exam 3 Review Hour Exam 3...

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1 Mon. Nov 29 Phy107 Hour Exam 3 Review Hour Exam 3 Review • Hour Exam 3 : Wednesday, Dec. 1 • In-class (1300 Sterling Hall) • Twenty multiple-choice questions • Will cover: 13 (Basic Quantum Mechanics) 14 (Uses of Quantum Mechanics) Addl. Lecture Material (Symmetry, solids, superconductivity) • You should bring Your student ID 1 page notes, written double sided Calculator Pencil for marking answer sheet Mon. Nov 29 Phy107 Hour Exam 3 Review Exam Review: Topics by chapter • Chap. 13: Principles of quantum mechanics Light quantization, matter waves. • Chap. 14: Uses of quantum mechanics Hydrogen atom, the wavefunction, uncertainty principle, entanglement. • Addl Topics: More quantum mechanics • Chap. 15: Physics of the nucleus Structure of nucleus, radiaoactive decay, half-life • Chap. 16: Fission and fusion Fission, fusion, nuclear weapons, reactors Mon. Nov 29 Phy107 Hour Exam 3 Review Chap. 13: Quantum Mechanics • Quantization of light – Light comes in discrete clumps (photons) – Light shows both particle and wave-like properties – Evidence for particel properties is • Matter waves – Matter shows both particle and wave-like properties – Evidence for wave properties is interference and diffraction deBroglie wavelength = Planck's constant momentum Mon. Nov 29 Phy107 Hour Exam 3 Review Photoelectric effect: PARTICLES Einstein says that light is made up of photons, individual ‘particles’, each with energy hf . One photon collides with one electron - knocks it out of metal. If photon doesn’t have enough energy, cannot knock electron out. Intensity ( = # photons / sec) doesn’t change this. Minimum frequency (maximum wavelength) required to eject electron Mon. Nov 29 Phy107 Hour Exam 3 Review Blackbody radiation • Blackbody radiation • Object emits light with a blackbody spectrum. • Peak position (color) changes with temperature White hot Red hot Mon. Nov 29 Phy107 Hour Exam 3 Review Topic: Wave properties of matter • All objects show both wave-like properties and particle-like properties. • Electromagnetic radiation (e.g. light) shows interference effects (wave-like properties), but also comes in discrete photons of energy hf (particle-like properties) • Matter clearly shows particle-like properties, but also shows interference and diffraction effects (wave-like properties).
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2 Mon. Nov 29 Phy107 Hour Exam 3 Review Matter waves • If light waves have particle-like properties, matter should have wave properties. • de Broglie postulated that the wavelength of
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This note was uploaded on 01/05/2012 for the course PHYS 107 taught by Professor N/a during the Spring '08 term at University of Wisconsin.

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Phy107HE3Review_6per - Hour Exam 3 Review Hour Exam 3...

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