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The power absorption coefficient and refractive index of water at temperatures of 4, 8.9, 30 and 50 o C have been measured in the wavenumber range 50-220 cm -1 . The power absorption coefficient profile is observed to increase with increase in temperatures from 4 to 8.9 and then to 30 o C. This is followed by a decrease in the profile at 50 o C. These results show...