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. . .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 above -
the concave reflector. It's great dinner conversation teaching the
unwashed how to become convinced that the image is hovering in space.