Spectroscopy
|
|
- Electromagnetic radiation is used to observe a substance and determine
its identity.
- Observing a molecule changes it.
- Every form of electromagnetic radiation has a corresponding frequency (n)
and wavelength (l) related by
n l = c, the speed of light.
| Electromagnetic Radiation |
Range |
Change |
Technique |
| X-ray |
|
core electrons move |
X-ray Crystalography |
| Far Ultraviolet |
|
valence electrons move |
Ultraviolet-Visible Spectroscopy (UV) |
| Near Ultraviolet |
200-400 nm |
valence electrons move |
| Visible |
400-800 nm |
valence electrons move |
| Infrared |
|
molecular vibrations |
IR Spectroscopy |
| Microwave |
|
molecular translations and rotations |
Microwave Spectroscopy |
| Radio |
|
nuclear flips |
Nuclear Magnetic Resonance Spectroscopy |
|
|
Copyright © 2003 and beyond
intergrader.net
Saturday, January 16, 2021 21:20