Please tell me, What are the possible sources to get more spectrometer information
Public Lab is an open community which collaboratively develops accessible, open source, Do-It-Yourself technologies for investigating local environmental health and justice issues.
As an open source community, we believe in open licensing of content so that other members of the community can leverage your work legally -- with attribution, of course. By joining the Public Lab site, you agree to release the content you post here under a Creative Commons Attribution Sharealike license, and the hardware designs you post under the CERN Open Hardware License 1.1 (full text). This has the added benefit that others must share their improvements in turn with you.
The page we have devoted to the Desktop Spectrometry Kit we sell in our online store is here desktop-spectrometry-kit-3-0, and it links to lots of information about how to get started with Public Lab kit-- you'll find step-by-step info about setup, activities, links to research notes, how-to's, etc. Even if you're not using our kit it might give you a good sense of how other folks have been exploring spectrometry in their own research. Good luck, and let us know if you have more questions!