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Photo System Engineering II, B&W negative films

I meant inhomogenieties as well and mistyped.

However, even though there are RI changes they are rather small but important. And they are not due to intermixing and rough surfaces.

PE
 

Oops, now I can see it - silly me.

The fast layers are coarse grained and the slow layers are finer grained. That is what you see as inhomogeneity and that is what can be seen by the light as changing the nature of the layers.

And so the difference between coarse and fine grained layers, wouldn't it explain for the refractive index difference?
 
To some extent, but the other differences I mentioned count as well. It all adds up. A little here and a little there and pretty soon you are talking about a real big effect!

PE
 
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