obliquity factor
obliquity factor
[ə′blik·wəd·ē ‚fak·tər] (optics)
A function which is proportional to the amplitudes of secondary waves propagating in various directions according to Huygens' principle; it is 1 + cos θ, where θ is the angle between the normal to the original wavefront and the normal to the secondary wavefront.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.