Written by Scott Sparrold

A thin prism or wedge with an apex angle of A and index of refraction n will bend light by the deviation angle D:

Notice this is an approximation. Full equation HERE (under construction)

Error of this equation versus apex angle versus index of refraction:

J.E. Greivenkamp Field Guide to Geometrical Optics, SPIE Press page 66

W.J. Smith Modern Optical Engineering 3rd Edition, McGraw Hill, page 93