pk chem 7 - Characteristics of a wave ectromagnetic...

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Characteristics of a wave http://www.nr.usu.edu/Geography-Department/rsgis/Remsen1/emspec/emspec.html ectromagnetic radiation: Transmission of energy in which electric and magnetic elds are propagated as waves. Wavelength ( λ ) Units : cm, m Frequency ( ν ) Units : s -1 (hertz: Hz) Velocity: Product of λ and ν . c = λ . ν elocity of electromagnetic radiation (OR) Speed of light 2.9979 x 10 8 ms -1 IN VACCUM
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Electromagnetic spectrum http://lasp.colorado.edu/cassini/education/Electromagnetic%20Spectrum.htm
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http://sol.sci.uop.edu/~jfalward/particlesandwaves/particlesandwaves.html Photoelectric effect 1. Electron emission occurs after the frequency exceeds ( ν 0 or f 0 ). 2. Number of electrons depends on intensity of light. 3. Kinetic energy of emitted electrons depends on frequency of light.
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http://physics.weber.edu/carroll/honors_images/plop.bmp Failures of classical mechanics
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Postulates of Bohr model: 1. Electrons move in circular orbits around the nucleus. 2. Electron has fixed set of orbits (stationary states). Energy of electron does not change when it is in the specific state. Angular momentum = nh/2 π , n = 1, 2, 3, …. . 3. Electron can move from one state to another by involving fixed amount of energy. Free electron: E = 0
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This note was uploaded on 03/25/2011 for the course CHEM 1211 taught by Professor Staff during the Spring '11 term at Georgia State University, Atlanta.

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pk chem 7 - Characteristics of a wave ectromagnetic...

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