Photoacoustic response of red fruit Pyracantha Coccinea
Abstract
The photoacoustic (PA) spectra of the red fruit Pyracantha Coccinea sample, prepared in a thick film form were investigated and analysed. Several absorption peaks were registered in the visible range of electromagnetic radiation while the most intense was at 548 nm. The obtained photoacoustic spectra were compared with the spectra of leaves, sea creatures and the human skin. There are significant similarities which confirm that similar bioorganic compounds are present in any living system. In particular, the obtained results confirm experimentally that the red fruits of Pyracantha Coccinea intensively absorbed UV solar rays and had several additional absorption bands in the visible and near infrared regions, i.e. in that part of the solar spectrum for which water is almost transparent.
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