The performance of this ultra‐low cost spectroscope is comparable with instruments typically costing much more
It uses a CD or DVD as a reflective diffraction grating and clearly shows Fraunhofer lines in the spectrum arising from natural light ‐ and distinctive emission bands from artificial sources such as sodium lamps
Differences between fluorescent lighting tubes ‐ e.g., white light or 'warm' light types ‐ can be easily identified by their distinctive emission bands
The spectroscope is made from virtually indestructible polypropylene and supplied in flat pack form ‐ taking about 30 seconds to assemble
It comes with a free CD but can be used with any CD (or a DVD for higher resolution)
