Re: LA Rail Revival

["M.B. and C.M.McDonald" <michael.and.colleen.mcdonald@xtra.co.nz>]

Think I'll throw my oar in here!  The situation with colour is not as simple
as you may think.  I haven't got the time to spend looking up references ...
but this is the situation as I understand it.

There are two main methods of producing by mixing, additive and subractive.

Additive, like colour TV and computer monitors, uses red, green, and blue as
others have already noted.

Subtractive, as on colour printers uses yellow, cyan, magenta, ( and black.)
They are not pure colours at all - perhaps better described as minus blue,
minus red, minus green respectively.

The human eye also has a part to play in making colour mixing work, but I
don't have any detailed knowledge of the performance of the colour receptors
in the eye (they're only in the central portion of the eye and don't work if
the light level is low).

The colours of the rainbow (it's an infinite number!) are all "pure" colours
and can't be made by mixing other colours.

Fortunately for us, the eye is not very selective.  Colours with different
spectral analysis may appear to be the same to us.

And now back to matters rail.  Auckland (NZ) has often been described as
having modelled itself on LA in making the car king.  If only it would still
look to LA and get some action into plans to bring back rail transport.
LA's "Green Line" loading of 23,000 passengers per day would overload
TranzRail's Auckland suburban network.

Cheers
Michael McDonald

Thomas Johnson wrote in message <7k8rlj$7r5$1@pegasus.csx.cam.ac.uk>...
>
>elson@westworld.com wrote in message <7k8nu3$qtl$1@nnrp1.deja.com>...
>>In article <37658F9D.70317423@ridgecrest.ca.us>,
>>  mmullen@ridgecrest.ca.us wrote:
>>> Come on, guys and gals.  You are trying to read some symbolism into
>>> someplace where it doesn't exist.  Red, Blue, and Green are just primary
>>> colors and there aren't that many to choose from.
>>
>>Sorry to nitpick, but green is not a primary color, it is a composite
>>color (green is blue + yellow). The primary colors are red, blue and
>>yellow.
>>
>Red, blue and green are the primary colours of light from which you can
make
>all other colours. Red, blue and yellow are the primary colours of things
>like paint.
>
>Thomas Johnson
>
>