Re: Color of Mirror

From: Paul Cardinale (pcardinale_at_volcanomail.com)
Date: 09/23/04 

Date: 23 Sep 2004 12:23:35 -0700

hhc314@yahoo.com (Harry Conover) wrote in message news:<7ce4e226.0409191225.4b0d2d87@posting.google.com>...
> harshadwarnekar@yahoo.com (Harshad) wrote in message news:<aa643641.0409170432.4a991582@posting.google.com>...
> > Hi All,
> >
> > Can anybody out there tell me if it is possible to create a mirror on
> > computer screen. I mean to say is it possible to have a combination of
> > RGB colors to have mirror effect on the screen.
>
> If you Google up an explanation of how a mirror works from a physical
> optics standpoint, you'll understand why why you ask to do is
> impossible. Note that all mirrors are either a conductive metalic
> surface, or the interface between two layers having subtantially
> different indices of refraction. Think about the effect
>
> > If not, then can we say that the RGB resolution of any of the latest
> > computer has not achieved all natural color possibilities that a human
> > eye can see.
>
> Huh? I don't seen any logical connection between your two questions.
>
> On the other hand, if you reference a 3-color chromaticity diagram it
> will become clear to you that 3-additive colors (such as those
> available in a color TV or computer monitor) CANNOT reproduce all of
> the natural natural color possibilities. For example, try to find
> brown or olive on the chart of red, green and blue primaries.
>

The absence of a color from a chromaticity diagram does not mean that
it cannot be represented on a 3-color system. Chromaticity diagrams
are 2-D while color space is 3-D. Chromaticity diagrams discard the
brightness dimension. Brown is dark red/orange, olive is dark green.
Anyone who have ever watched color TV knows that both of those colors
can be reproduced. Note also, that the term '3-color chromaticity
diagram' is a nonsense term; chromaticity diagrams do not have a
number of colors.

Paul Cardinale