L02AtomicI145s10

L02AtomicI145s10 - Lecture 2, spring 2010 ENGR 145:...

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Unformatted text preview: Lecture 2, spring 2010 ENGR 145: Chemistry of Materials Case Western Reserve University Lecture 2 Atomic Theory I Waves, Light, & Electrons Reading assignment: OGC 4.1-4.3 Learning objectives: Understand how data on blackbody radiation contributed to the development of quantum mechanics Understand how the photoelectric effect illustrates the particle nature of light , and how it allows measurement of the work function of a surface Be able to compute the Bohr radius and allowed energy levels for electrons in one-electron atoms ENGR 145: Chemistry of Materials Case Western Reserve University Classical Mechanics vs. Quantum Mechanics Classical mechanics : energy of a system can be continuously* varied Quantum mechanics : energy states are quantized * This turns out to be true if the energy changes are large compared to quantum phenomena ENGR 145: Chemistry of Materials Case Western Reserve University Classical Mechanics vs. Quantum Mechanics Classical mechanics : energy of a system can be continuously* varied Quantum mechanics : energy states are quantized * This turns out to be true if the energy changes are large compared to quantum phenomena Lecture 2, spring 2010 Wave motion: Amplitude, A Wavelength, [m] Frequency, [s-1 ] = 1/ Velocity or speed [m/s] ENGR 145: Chemistry of Materials Case Western Reserve University Wave Motion (OGC 4.1) A OGC Figure 4.1: water wave = Lecture 2, spring 2010 ENGR 145: Chemistry of Materials Case Western Reserve University Light as Waves (OGC 4.1) OGC Figure 4.2: light wave c = Light: electromagnetic radiation Electric feld, E Magnetic feld, H Speed o light in vacuum: c = 2.9979 ....
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This note was uploaded on 01/30/2011 for the course EMSE 103 taught by Professor Ggh during the Spring '10 term at Case Western.

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L02AtomicI145s10 - Lecture 2, spring 2010 ENGR 145:...

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