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Direct linkThompson, Frank – Physics Education, 2022
An absorption line at 900 nm has been observed in Perspex. Samples of 1 and 2 cm thickness were used and the integrated absorption (line width times peak absorption) of the line was proportionate to the thickness. Facilities for lowering the sample temperature were not available and therefore both measurements were carried out at room temperature.…
Descriptors: Spectroscopy, Chemistry, Physics, Climate
Thompson, Frank – Physics Education, 2012
A simplified theoretical explanation of dispersion in dielectric materials has been given and experiments have been carried out on two liquids, namely, distilled water and sunflower oil. The appendix contains a detailed description of the construction of a homemade spectrometer and hollow prism and an assessment of its suitability for the above…
Descriptors: Experiments, Measurement, Light, Spectroscopy
