7.2 History of Raman Spectroscopy
Elizabeth Johnson
Learning Objectives
- Describe the career of C.V. Raman, how he discovered the theory of Raman spectroscopy, and how he conducted experiments to demonstrate Raman scattering.
Prior Knowledge and SKILLS
None
Key Terms
Quartz spectrograph
Raman scattering
Guided Inquiry
- Read the online article from the American Chemical Society about Raman and his discovery (also available as a .pdf): http://www.acs.org/content/acs/en/education/whatischemistry/landmarks/ramaneffect.html
- Read the Wikipedia entry on the biography of Chandrasekhara Venkata Raman: https://en.wikipedia.org/wiki/C._V._Raman
7.2.1 Summarize the professional career of C.V. Raman. Did he take a traditional route to get to academia? What jobs did he hold?
7.2.2 How did Raman come up with the idea that led to his development of Raman spectroscopy?
7.2.3 What were the original light sources for Raman’s experiments?
7.2.4 What is a quartz spectrograph, and how did Raman use it in his Raman scattering experiments?
7.2.5 What new technology was responsible for making Raman spectroscopy into a practical tool?
Summary
C.V. Raman was a talented physicist with interests in music and scattered light which led to his discovery of Raman scattering. He was awarded the Nobel Prize in Physics in 1930. Raman showed that, although most light reflected from a substance was the same color or wavelength, a small amount of light experiences a color or wavelength shift when it is reflected. Modern lasers made Raman spectroscopy viable as a technique for determining physical and chemical properties of materials (including geological materials).
References
American Chemical Society International Historic Chemical Landmarks. (ret. 12/1/2018). The Raman Effect. (ret. 12/1/2018) 8 p. http://www.acs.org/content/acs/en/education/whatischemistry/landmarks/ramaneffect.html.
Wikipedia contributors. (2018, November 28). C. V. Raman. In Wikipedia, The Free Encyclopedia. Retrieved 02:10, December 3, 2018, from https://en.wikipedia.org/w/index.php?title=C._V._Raman&oldid=871005159