Absorption loss due to high harmonics of C-H vibrations, the primary loss factor in PMMA POF, was analyzed and calculated. And the results were consistent with measured datas.
Water vapour and clouds are the primary variables modulating direct solar absorption.
水汽和云是调节直接太阳吸收的主要要素。
3
Based on the light absorption property of the formed suspended particle a new method for determining NH3-N by primary-secondary wavelength spectrophotometry was developed.