Remember that the difference between an ordinary and a circular polarizor is that a circular polarizor "depolarises" the light after filtering out light being polarized in one direction (well, actually it converts linear polarized light into circular polarized light - thus the name).
Therefore two circular polarizors in a series will not be able to "go black", as two linear polarizors do. If you use one of both you have to place the linear polarizor in front of the circular polarizor, not the other way around. DagT > Fra: "Dr E D F Williams" <[EMAIL PROTECTED]> > > If anyone has two circular polarizers I'd be grateful if you would perform a > test. Put one over the other and rotate to see if the field becomes > completely dark when they are crossed. And ... if you also have an ordinary > polarizer try the same experiment using one normal and one circular > polarizer. > > Don > _______________ > Dr E D F Williams > http://personal.inet.fi/cool/don.williams > Author's Web Site and Photo Gallery > Updated: July 31, 2003 > > > >
