This is what I think :

I suppose that would depend on the thickness of the glass, the curvature etc. Refraction index is used for optics mostly (spectacles especially) It determines how much the glass "bends" the light that goes through it. So the answer is, it depends. How thick is your glass ? what is the curvature ? convex or concave ? both sides curved or only one side ? or maybe it's wavy ? all this will affect the refractive index. So there's no one RI, it depends on the characteristics of the glass

But I could be wrong I guess

This post has been edited by wodenus: Nov 14 2004, 02:20 PM

Where's the fire ? LOL.. j/k