Re: Path of light...

["Donald E. Simanek" <dsimanek@eagle.lhup.edu>]

On Mon, 31 Mar 1997, David Dockstader wrote:

> The helical description sounds circularly polarized waves.
> This bring another question to mind.  Anyone know why you are supposed
> to use circular polarizers rather than linear polarizers on automatic
> cameras.   I think this is principally for autofocus SLR's.  I find
> that even with circular polarizers the meter consistantly underexposes
> and find no real benefit to circular over linear (except that somebody
> made a lot more money selling me the circular polarizers).

I'm curious. What were the touted advantages of the circular polarizers
over linear ones for photographic purposes?

	-- Donald

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Dr. Donald E. Simanek                            Office: 717-893-2079
Prof. of Physics                    Internet: dsimanek@eagle.lhup.edu
Lock Haven University, Lock Haven, PA. 17745          CIS: 73147,2166 
Home page: http://www.lhup.edu/~dsimanek            FAX: 717-893-2047
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