on 9/4/2002 3:21 PM, [EMAIL PROTECTED] at [EMAIL PROTECTED] wrote: > The SI system also has dimensionless quantities such as > refractive index. I am puzzled by how these things get in.
SI is a system of UNITS not a system of QUANTITIES. Length is a quantity; meter is its SI unit. Refractive index is a quantity; it is unitless (in any system of units). I'm puzzled as to why the writer thought that "refractive index" had "gotten in" to SI. Regards, Bill Hooper physics professor (retired), Florida, USA ======================== Keep It Simple - Make It Metric! ========================
