6 Minute ReadIntroduction In two earlier posts on this site we recorded the absorption spectrum of molecular iodine I2 with some simple instrumentation. The first section outlined the basic theory giving rise to the vibrational absorption bands in the spectrum of any diatomic molecule. The second section described how the home experimenter can produce an absorption spectrum […]
The Fluorescence Spectrum of Iodine Read More »
5 Minute ReadMeasuring the fluorescence from highlighter pens is always an interesting educational experiment to try and is very popular in schools and colleges to demonstrate the basic principles of fluorescence and spectra. Usually, green, blue or violet laser pointers are used to excite the sample.
Highlighter Pen Fluorescence Read More »
9 Minute ReadWhat is Fluorescence? Before we can consider what is fluorescence in scientificterms, we must mention the general process of luminescence. Luminescence is defined as any emission of light (electromagnetic or ionizing radiation) from any substance that is NOT caused by thermal heating of that substance. Yes, I know, that sounds a bit dry. Scientific definitions
