Spectroscopy is the study of the interaction between matter and electromagnetic radiation. Historically, spectroscopy originated through the study of visible light dispersed according to its wavelength, by a prism. Later the concept was expanded greatly to include any interaction with radiative energy as a function of its wavelength or frequency. Spectroscopic data are often represented by an emission spectrum, a plot of the response of interest as a function of wavelength or frequency.
Click on the image above to view a Power Point Presentation by Deborah Scherrer of Stanford University on Understanding Spectroscopy.
This image is of Chris Bailey's home made equipment used to capture the spectrum of the sun, at our International SunDay on Dunwich Heath N.T.Site....
for more info why not come along and chat to Chris.