2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/85348The parametric formulas are obtained whereby the refractive index and the light group velocity could be calculated for any water state (salinity, pressure, temperature) inside of the light wavelength region from 200 nm to 1200 nm. These formulas are suitable to be used in underwater neutrino telescope activity.Latex, 9 pages, 5 eps figure, 1 table, (To be submitted to Nucl. Instrum. Meth. A)Instrumentation and Detectorstext