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Re: Diverging lenses

On Mon, 14 May 2001 11:47:22 -0600 SSHS KPHOX <kphox@MAIL.CCSD.K12.CO.US>
writes:
PHYS-L@lists.nau.edu writes:
Other than vision correction, is there other common uses
for diverging lenses?

Here are two obvious ones _ _ _ _

*The ocular lens of a Galilean telescope

*Laser beam expander for viewing holographs

Herb




An achromatic objective in a telescope has one of each with
different
compositions to minimize chromatic aberation.

The peep hole in my front door has one of those.

hmmmm... a start.

Ken Fox
AP/IB Physics Teacher
Smoky Hill High School
Aurora, CO



Herb Gottlieb from New York City
(Where it's nice to live but I wouldn't
want to be a tourist here)
herbgottlieb@juno.com