Nov 10, 2017 | Characterization, Glossary of Spectroscopy Terms
Photosynthetically active radiation is any radiation that can be used for photosynthesis. This is generally wavelengths in the visible range (400-700nm). Radiation outside this range is given zero weight. This is slightly different than photometry, which has...
Nov 10, 2017 | Characterization, Glossary of Spectroscopy Terms
The photosynthetic photon flux density is the amount of photosynthetically active photons (400-700nm) hitting a surface per unit area per unit time. The units are µmol (of photons) m-2 s-1.
Nov 10, 2017 | Characterization, Glossary of Spectroscopy Terms
Radiometry is simply the measurement of light. There are many characteristics of light that can be measured, but the most common are wavelength (color) related quantities and power related quantities, such as irradiance. StellarNet offers spectroradiometer systems for...
Nov 10, 2017 | Glossary of Spectroscopy Terms, Properties of Light
The color rendering index is a way to quantify whether colors under a light source will look the same as in daylight. This is reflected (figuratively and literally) in the light source’s spectrum. A light source with a spectrum that is different than the sun will have...
Nov 10, 2017 | Glossary of Spectroscopy Terms, StellarNet Definition
The ChemWiz Concentration Predictor makes use of the Beer-Lambert law (see absorption spectroscopy) to predict the concentration of unknown samples. It can be accessed by clicking “Applications” > “ChemWiz Methods,” “Chem,” or the chemistry glassware icon. By...
Nov 10, 2017 | Glossary of Spectroscopy Terms, Properties of Light, StellarNet Definition
When talking about light, intensity is the power per unit area when the light is transmitted through a (real or imaginary) flat surface that is perpendicular to the direction of the beam. It is usually represented by the symbol Iand common units are W/m2 or W/cm2. For...