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10 cards from this deck
Pattern of specific wavelengths emitted by excited atoms
Dark lines when white light passes through cooler gas
Transitions ending at n=2 (visible light)
n=1, lowest energy level
ΔE=Ef−Ei\Delta E = E_f - E_iΔE=Ef−Ei (energy difference between levels)
Ultraviolet, transitions ending at n=1
Infrared, transitions ending at n=3
Exact inverse; same wavelengths, opposite processes
Object moving away; wavelengths appear longer (redder)
Its energy levels match infrared wavelengths; absorbs IR
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