> >I know the IORs of water and glass are 1.33 and 1.5, but there are a number
> >of materials that it would be handy to know the IORs for.
> >
> >Perspex
> >PET (plastic, recycling number 1)
> >Pyrex
> >Quartz glass

Perspex is the same as Plexiglass (i.e. Polymethylmethacrylate) and hence 
on the list posted by Alan Kong.  There should also be a plexiglass 
texture included in one of the libraries with POV.

> I don't know the IOR of pyrex but I _do_ know it is essentially equal to
> that of Wesson Corn Oil.  Really.  Submerge a pyrex lab beaker in a bowl
> full of Wesson, and the beaker disappears.  It's the coolest physics demo I
> do in my class.

Or the same as Glycerol at ~20C
 
Jamie.

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