Abstract

The refractive index of NH4Cl–H2O solutions has been measured over a wavelength range from 496.5 to 690 nm. The NH4Cl concentration was varied from 15 to 30 wt. % over a temperature range from 10 to 35 °C. We obtained mathematical equations relating the refractive index to wavelength, temperature, and concentration using the least-squares method. A knowledge of these properties is important for analyzing and modeling the dendritic growth of this system.

© 1996 Optical Society of America

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