Re: Terminology Question

[Bernard Cleyet <anngeorg@PACBELL.NET>]

If it's Italian it's Kladni;  check google.   [Italian and Spanish are
opposite:  ci, Italian is ch, Spanish.  While Spanish qu, and c, is italian
ch.  [I doubt that there is a single "native" Spanish word that uses k.]

If light forms the image it's real, if it's an illusion e.g. an image from a
negative lens only, it's imaginary (whoops, virtual).  One way to test is if
a ground glass is interposed, and the image is seen on the glass it's real.
A screen placed ~ where the eye was with a telescope using a + lens for the
ocular will show an image. Not with a Galilean telescope.

Por supuesto, try Pasco -- I suspect all the scientific suppliers that
service Physics have it.

bc who may not know what he's writing about.

Tom Ford wrote:

> I would appreciate the response, from anyone interested, to the following
> three questions:
>
> 1. How should one pronounce "Chladni" whose nodal 2-D sand patterns
> interest us all but particularly provoked Faraday? How about a phonetic
> spelling or some homophones?
>
> 2. With the apparatus variously described as Confocal Reflectors, Mirage,
> ContaConcave Mirrors etc., is the floating image best described as: Real,
> Virtual, a Hologram, some combination of these, or something else? Various
> practitioners and advertisers seem to use different terminology.
>
> 3. Is there a catalog/commercial source for resistive paper (of the kind
> used to plot equipotential lines)?
>
> Thank you.
>
> Tom Ford