Feb 26, 2017 | Glossary of Spectroscopy Terms
Molecules have many types of energy levels and all of them can be excited by absorbing photons. Two common energy levels are electronic, where the electrons get excited into higher energy levels, and vibrational, where molecules get excited into different types of...
Feb 26, 2017 | Glossary of Spectroscopy Terms
Fluorescence spectroscopy uses the process of fluorescence to learn about samples. Because of the nature of fluorescence, a single excitation wavelength can produce a fluorescence spectrum that can be used to identify samples. The Spectral ID application in the...
Feb 26, 2017 | Glossary of Spectroscopy Terms, Properties of Light
Raman scattering is an inelastic scattering process that can be used to probe vibrational energy levels. All molecules can vibrate in various ways, but it takes energy to do so. Vibrations have energy levels, just like electrons do. To make molecules vibrate, a...
Feb 26, 2017 | Glossary of Spectroscopy Terms, Properties of Light
What is Diffuse Reflectance? Diffuse reflectance is a measurement technique used to analyze light scattered and reflected from the surface of a sample. Unlike specular reflection, which reflects light in a single direction, diffuse reflectance occurs when light...
Feb 26, 2017 | Glossary of Spectroscopy Terms, Properties of Light
In general, scattering is what happens when light is forced to deviate from a straight path, or forced to deviate from a reflection angle described by the law of reflection. For example, in the X-ray region, atoms can scatter the X-rays in a well defined pattern. This...