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Re: projectors

-----Original Message-----

Speaking of resolution, I just returned from doing a radioac. decay
demo. for my
friend's Chem. class at N. High. I used his large TV, my new G4
portable, and Vernier's
rad. monitor, Logger Pro and Lab. Pro. interface -- the resolution was
worse than
unacceptable!

Did I do something wrong, or should the HS get a projection system, or
for less, a
hundred dollar camera, and have it look at my G4 screen?.



The resolution of a typical TV (used with an Elmo type device or with a
computer-to-video adapter) is far less than the resolution of a computer monitor
or a computer data projector. There's no comparison at all. Text on a computer
screen, unless it is very large, is illegible when shown on a TV.

If you want the class to be able to see what you see on a computer screen, you
need a proper computer data projector. Even a 640x480 pixel projector is far
better than a TV of any quality.

How did the demo go?

JEG

--
John E. Gastineau john@gastineau.org
140 Tenderfoot Road (301) 387-8494
Oakland MD 21550-6957 (301) 387-8495 fax
USA http://gastineau.org