Spectroscopy

Scientists are constantly trying to figure out the identities and chemical make-up of unknown species. Spectroscopy is one of the many means used to help discover the identities of the unknown sample. Spectroscopy is the study of chemical species by the way they absorb or emit light or other forms of radiation.

Different types of Spectroscopy

          1. Absorption Spectroscopy refers to the types of spectroscopy involving the unknown compound absorbing energy (usually in the form of light). This absorption of energy requires the unknown to become excited, which can be measured. The most common forms of absorption spectroscopy are infrared and ultraviolet-visible (UV-vis).

          2. Emission Spectroscopy occurs when an excited substance releases energy in the form of wavelengths of light. The emitted wavelengths can be measured and the identity of the unknown can be found. Flame tests are a very common type of emission spectroscopy where the unknown sample will give off a specific color when placed in a flame.

          3. Scattering Spectroscopy involves the scattering of the absorbed wavelengths of light. The degree and patterns of the scattered light will give insight to the structure of the unknown. X-ray diffraction is one type of scattering spectroscopy.

Related Links:

Chemistry
Organic Chemistry
Alkane Structure and Bonding
Dipole-Dipole Interactions



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