Visible Spectrum

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Solar <strong>Spectrum</strong>• Fraunhofer discovered lines in solar spectrum 1817• D=Sodium, C&F&h=Hydrogen, H&K=Calcium• Different elements have a different set of lines like a bar code
Annie Jump Cannon• Originated the modern stellarclassification scheme in 1901• Based on strength of H lines• Found to be temperature sequenceClassified 400,000 stars forthe Henry Draper Catalogs
Page 1 and 2: Visible Spectrum• Prism splits Vi
Page 3 and 4: Electromagnetism• Changing electr
Page 5 and 6: All Electromagnetic WavesMove at th
Page 7 and 8: Radio Waves• Hertz discovered rad
Page 9: Infrared Region• Bag is transpare
Page 12 and 13: Gamma Rays• Produced by very hot
Page 14 and 15: Atmospheric Opacity• Opacity is t
Page 16 and 17: Heat or Thermal Energy• The hotte
Page 18 and 19: Blackbody Radiation• A blackbody
Page 20 and 21: Wein’s Law• As the temperature
Page 22 and 23: Blackbody Curve• After attempts b
Page 24 and 25: Planet Impact?• Star HD172555 has
Page 26 and 27: Moving Source• Wavelengths in dir
Page 28 and 29: Relative Motion• Stationary obser
Page 30 and 31: Picturesof Atoms• 48 iron atoms o
Page 32 and 33: What’s an Atom?-Nucleus & Electro
Page 34 and 35: Neutrons & Isotopes
Page 37 and 38: Bohr Atom• Tiny positive nucleusc
Page 39 and 40: Photon Emission/Absorption• The e
Page 41 and 42: Electron: is a particle & a wave•
Page 43 and 44: EmissionMatchesAbsorptionSpectrum
Page 45 and 46: PhotonAbsorptionandEmission• Elec
Page 47: Spectra ofMolecules• Carbon Monox
Page 51 and 52: Cecilia Payne-Gaposchkin• Found t
Page 53 and 54: Thermal Broadening• Because the a
Page 55 and 56: Pressure/Collisional Broadening•
Page 57 and 58: Discovering Extrasolar Planets• S
Page 60 and 61: Electromagnetic Spectrum• All ele
Page 62 and 63: Energy LevelDiagram of aHydrogen At
Page 64 and 65: Pressure• Gas is made of tiny ato
Page 66 and 67: Relative Radii of Atoms• Atomic r
Page 68 and 69: Time to Solar System Formation• M
Page 70 and 71: Transitions of Hydrogen• Differen
Page 72 and 73: Spectral Sequence = Temperature Seq
Page 74 and 75: Solar Spectrum• Millions of absor
Page 76 and 77: Types of SpectraWe usually look at
Page 78 and 79: (B-V) Color Index• Counting the n
Page 80 and 81: Wien’s Law• Wavelength of maxim
Page 82 and 83: Loss ofAtmosphere• First atmosphe

Visible Spectrum

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