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Bob Sciamanda wrote, in response to Huge Haskell:above -
-----Original Message-----
From: Bob Sciamanda [mailto:trebor@VELOCITY.NET]
Sent: Tuesday, March 19, 2002 2:16 PM
From: "Hugh Haskell" <hhaskell@MINDSPRING.COM>
. . .Not really difficult. . . . When at dinner, look for reflective concave
As I think about it, I recall that it is possible to create a real
image in a concave mirror, but because of the geometry, it is
difficult to display the image.
. . .
surfaces, like soupspoons, goblets, etc. Very often one can display a
diminished, real image of a chandelier floating within - or just
orthe concave reflector. It's great dinner conversation teaching the
unwashed how to become convinced that the image is hovering in space.
It's not difficult, but you need to form an image for an off-axis object
use a large mirror with a small screen, else your screen will obscurethe
light from hitting the mirror in the first place.
*********************************************
"Artificial intelligence is no match for
natural stupidity."
-Anonymous
********************************************
George Spagna
Department of Physics
Randolph-Macon College
P.O. Box 5005
Ashland, VA 23005-5505
phone: (804) 752-7344
FAX (804) 752-4724
e-mail: gspagna@rmc.edu
http://www.rmc.edu/~gspagna/
Bob Sciamanda (W3NLV)
Physics, Edinboro Univ of PA (em)
trebor@velocity.net
http://www.velocity.net/~trebor