"The spectroscope is an instrument for analysing light.// Now, other kinds of light besides sunlight can be analysed. Light from any substance which has been made incandescent may be observed with the spectroscope in the same way, and each element can be thus separated. It is found that each substance (in the same conditions of pressure, etc.) gives a constant spectrum of its own. Each metal displays its own distinctive colour. It is obvious, therefore, that the spectrum provides the means for identifying a particular substance. It was by this method that we discovered in the sun the presence of such well-known elements as sodium, iron, copper, zinc, and magnesium."
[Sol, acuarela. Alma Project. Connie Mendoza, 2008]
J. Arthur Thomson, The Outline of Science, Vol. 1 (of 4)
A Plain Story Simply Told, 1922
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Hello, as you can see this is my first post here.
In first steps it's very nice if somebody supports you, so hope to meet friendly and helpful people here. Let me know if I can help you.
Thanks and good luck everyone! ;)
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