How to find and see the lateral displacement of light when entering a new material with different refractive index?[br]Here you can see the answer.[br]The segment between arrows is the lateral displacement.[br]α is the refracted angle according to the refractive index.[br]β is the remaining angle, which is the size the the angle turned between two materials.[br]The longer dotted line ray is the original path without that material.[br]The shorter dotted line segment is the horizontal segment which represents the width of the material.[br][br]Update #1 (4/4/2015 06:12 UTC+0):[br]Refractive index is changed to 2 decimal places.[br]The lateral displacement display is changed to 5 decimal places.