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part1_light - Light Information Hands off What is light An...

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8/25/2009 1 Light Information! Hands off! What is light? An oscillating electro-magnetic wave Wave Wavelength (λ) Speed (c) Frequency (f) c = λf c=CONSTANT!!!! λ , f or λ , f What types of light are out there? What types of light do astronomers study? Types of light Light Wavelength Frequency Radio Long Low Microwave Infrared Visible (ROYGBIV) Ultraviolent X-ray Gramma-ray Short High
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8/25/2009 2 But wait! Schizophrenic nature of light Acts like a wave Acts like a particle Particle of energy Photon Energy (E) – frequency (f) E , f or E , f Types of light Light Wavelength Frequency Energy Radio Long Low Microwave Infrared Visible Ultraviolet X-ray Gamma-ray Short High High Low Spectra/Spectrum
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8/25/2009 3 What produces each type of spectrum? Hot gas Prism Hot Solid Cool gas Continuous Emission Absorption Black body Hot, “solid” light source Amount of light? Depends
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part1_light - Light Information Hands off What is light An...

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