The index of refraction for the ordinary ray is constant and is independent of direction. The index of refraction for the extraordinary ray is a continuous function of direction. The index of refraction for the ordinary ray is independent of direction. The two indices of refraction are equal only in the direction of an optic axis. The measure of birefringence (Î´) [delta] is the difference between the indices of refraction of the two rays.
A preview of what LinkedIn members have to say about Rob: 1  Rob Joyce is the sort of building contractor you can trust. As development director at Mansell, he was always a pleasure to do business with, and ensured the correct people within his organisation provided us with the pre contract advice we needed.
FROM Billericay to Barry and on to Hollywood, Rob Brydon has seen his career go sky high. We know he is a stand-up and impressionist extraordinaire, but just who is the man behind the mirth? Rob Brydon is a comedian from Wales who has rocketed to fame through TV work Who is Rob Brydon? Born Robert Brydon Jones on May 3, 1965, in Baglan, Port Talbot, Wales to school teacher mother Joy and car dealer father Howard, Rob is now a famous actor and comedian. The 5ft 7in star has a younger brother called Peter.