| Spectral Lines/Spectroscopy - " Glo-doodler" |

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| References |
"Figuring Physics", TPT, Vol. 43, # 2, Feb. 2005, p. 117. Kenneth Brecher, "Do Atoms Really "Emit" Absorption Lines?", TPT, Vol. 29, # 7, July 1991, p. 454.
O-740: "Fabrics & Theatrical Filters," DICK and RAE Physics Demo Notebook.
James C. Kernohan, "Astronomy Demonstration," PIRA News, Vol. 9. No 3, pp. 21.
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Stille