International Journal of Academic and Applied Research (IJAAR)   Year: 2021 | Volume: 5 | Issue: 6 | Page No.: 108-112 Non-Destructive test on Sun and Shadow Plant by Photoacoustic spectroscopy (PAS) Salma A. H .Ali ,Mubrarak Dirar Abd-Alla, , Abdalskhi .S.M.Hamed &Abdalgadir.Alfa.Abdalgadir Abstract: In this study, used Photoacoustic spectroscopy (PAS) in Non-Destructive test on the plant that growth in Sun and Shadow (Bougainvillea spp 1l in shadow, Bougainvillea spp 1 in sun, Citrus Sanseis in sun, Citrus Sanseis in shadow, Canna Indicia in sun, Canna Indicia in shadow, Ixora Coccinnia in sun, Ixora Coccinnia in shadow, Bougainvillea Spp2 in sun, Bougainvillea Spp2 in sun, Citrus Paradisi in shadow and Citrus Paradisi in sun). In (PAS) the absorbed light is transformed to an acoustic wave. A Photoacoustic spectrum consist of a plot of the intensity of the acoustic signal against the excitation wavelength or another quantity related to the photon energy of the modulated excitation. By Photoacoustic spectroscopy (PAS) have been detected the following vibration bonds ( S-S stretching, S-S stretching , C-H stretching C-S stretching ,S=O stretching , N-H stretching and O-H stretching ) on the different wavelengths according the plant and it place growth .