On Mon, 24 Feb 2003 21:36:23 -0600, William Robb wrote: > > newton rings only occur when you sandwich > > two pieces of glass right? Well in this case > > there is only 1 piece of glass, the scanner's > > bed glass. I am confused. > > Newton rings can occur whenever two surfaces come in close proximity. It's > just an interference pattern.
IIRC, the problem occurs when two surfaces with refractive indices different than each other, and also different than the local ambient air, come into contact to within "diffraction distances" of each other ... that is, within about 10 wavelengths to 0.1 wavelength, where the size of the space itself can have a quantum effect on the (energy of the) photons passing through it. TTYL, DougF KG4LMZ
