Light, Colors & Stars Using Spectroscopy to Investigate Temperature, Motion & Composition at a Distance A Question & Story to start us off.

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Presentation transcript:

Light, Colors & Stars Using Spectroscopy to Investigate Temperature, Motion & Composition at a Distance A Question & Story to start us off

Spectrum Overview

The Visible Spectrum You Tube Video: Relative size of Visible Spectrum

Black Body Simulation Wien’s Law

Spectroscopy & Composition 1802, William Hyde Wollaston 1814, Joseph von Fraunhofer

Origins of Spectrochemistry 1832, J F Herschel –Coloration of flame 1913, Bohr’s atom –Explains simple line spectra chemistry-flame-test.html Bohr Model Applet with Spectrum Bohr Model Flash Animation

Kirchhoff’s Laws 1859, Gustav Robert Kirchhoff & Robert Bunsen –Reversibility of lines –Unique/specific to element Hot & Dense: continuous Hotter & Not Dense: emission lines Cooler & Not Dense absorption lines Temp is relative to background

Solar Radiation & Atmospheric Filtering Molecules & Light Sim

Our Atomosphere the Filter: Hidden by the Atmosphere UVX-RayIR

Where to put your telescope?

Red/Blue Shift news/2003/07/59481 odin.physastro.mnsu.edu/.../astr101/week5.html Doppler Simulation Though Sim is for sound waves, the principle works the same

Motion of Galaxies

Application of Absorption Spectrum & Doppler