Spectrophotometry deals with the measurement of the interaction of light with materials. Light can be reflected, transmitted, scattered, or absorbed, and a material can emit light, either because it has absorbed some light and it reemits it, because it has gained energy in some other way (e.g., electroluminescence), or because it emits light due to its temperature (e.g., incandescence).
The spectrophotometer is an important scientific tool, most commonly used in biology and chemistry. It usually requires expensive lab equipment, but D. Hingston designed a rig to do the job at home almost cost-free. The heart of the rig consists in a normal filament-based flashlight bulb, which produces good-quality white light containing all colors. A prism is then used to split the light into its component wavelengths, so that the sample can be tested across the whole light spectrum. It is a simple craft that can be achieved with fairly common materials, barring the prism which may need to be specially ordered. (More info on how to build your own spectrophotometer can be found in this video).
Bibliography:
SPECTROPHOTOMETRY-Thomas A. Germer, Benjamin K. Tsai, Experimental Methods in the Physical Sciences, 2014
HOMEMADE APPLICATIONS-How to build a spectrophotometer at home
ELECTROLUMINESCENCE-C. Moretti, V. Koncar, Smart Textiles and their applications, 2016.
WIKIPEDIA, INCANDESCENCE-https://en.wikipedia.org/wiki/Incandescence
Nessun commento:
Posta un commento