Also, sorry, I phrased it wrong: The IOR is less in the red that in the blue color (that’s why we substract from red and add in blue), as you can see attached in the former response. So blue is refracted more than red as I understand it, no? Probably this has to do with the human visible spectrum (we don’t see infrarreds nor UV, both related with the red wavelenth). Correct me if I am wrong!
