Re: ATM Got fringes

["Bob May" <bobmay@nethere.com>]

Fringes work by the reflection of the light at each surface.  You get about
4% reflection at each surface and when the distance is right, the reflection
of the light is constructive and other places with a different distance, the
light is destructive in it's reflection back out towards you.  Thus the
fringe location is dependant upon both the light frequency and the angle you
view them at.  If you get too many waves of distance between, the coherence
of the light (basically how pure it is) will destroy the fringes as the
fringes will walk over each other.
Bob May
http://nav.to/bobmay
bobmay@nethere.com