f10_sep23 - Ast 307 - Thurs., Sep. 23 Light, Spectra,...

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Ast 307 - Thurs., Sep. 23 Emission Spectra The atoms of each (ion of each) element have their own distinctive set of electron energy levels. Each element emits its own pattern of colors, like fingerprints. If it is a hot gas, we see these in the form of an emission line spectrum . How Atoms Absorb and Emit Light
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Electron Orbits or “Energy Levels Each electron exists in an orbit with fixed energy (also called an “energy level.” Electrons gain/lose energy by jumping from an orbit of lower to higher/higher to lower energy. When electrons have the lowest energy possible, we say the atom is in the ground state . When electrons have more energy than this, we say the atom is in an excited state . When electrons gain enough energy to escape the nucleus, we say the atom is ionized . Electron Transitions in Hydrogen Electron Transitions in Hydrogen 1 " = R 1 n 2 # 1 m 2 $ % ( ) n and m are integers, R is the Rydberg constant: R = 1.097 ! 10 7 m
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f10_sep23 - Ast 307 - Thurs., Sep. 23 Light, Spectra,...

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