🚀 go-pugleaf

MILDRED J. MOORE (mrmoore@ix.netcom.com) wrote:
: In <5e5onj$f5a@boursy.news.erols.com> mccadden@erols.com (Scott
: McCaddem) writes: 
: >
: >Gerald Copp <G.Copp> wrote:
: >
: >>>What color would the light be if red, blue and yellow light are
: >>>combined?
: >
: >
: >>In terms of primary light, yellow is a combination of blue and green.
: >
: >>So theoretically you have 
: >
: >>			red light + blue light + yellow light
: >
: >>   =  red light + blue light + (blue + green) light
: >
: >>   =  white light
: >
: >
: >>Since you have all three primary colours present.
: >
: >None of this has anything 2 do with skating  but, yellow is not a
: mixture of blue and
: >green, it is a primary color. Green is made from yellow + blue. I
: thought they taught this
: >stuff to people in pree school with fingerpaints and stuff. Guess not
: :� But it doesn't
: >matter because the important thing is that all the primary colors are
: there, which you
: >already said. So why am I posting this article? I duno, bored I guess.
: >
: >
: >
: Guess you didn't read close enough. This post was about light, not
: paint. In LIGHT green is a primary color, not a combination.
: In light yellow is a combination of other colors.

: Guess you're the one who needs to repeat a grade.

: M. Moore, who is really tired of this thread, but has a problem letting
:           incorrect information pass...

I'm still trying to understand how a continuous range of VIBRATION
gets "broken up" into "primary" and "secondary" and "tertiary" colors
in any but the linguistically abstract sense.  For practical,
pragmatic purposes you can "derive" various colors with combinations
of paints or filters (gels for you drama kids), but in the sense of
physics, it's all wave mechanics, and this "primary" quibble has no
substance or real meaning outside of a couple of pragmatic trades
which bear little relation to optical physics, because _every_ hue
exists in the continuum of vibration.  Yes, basic trig says you can
add phase angles and produce waves further along the spectrum, and
perhaps that new wave has a characteristic which, by sheerest chance
of evolution, means something to the human eye...but this is an
ultimately parocial and species-local event.  If you're red and you
want to be purple, you simply vibrate faster, you don't "add" or
"subtract" anything.

I think people are getting preoccupied with a practical approximation
to the detriment of their grasp of the underlying reality, like those
simpletons who think Pi is 22/7.

Joan

-- 
=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=
Wombat! Transexual Menace! Vicus Lusorum! Curry! Request public key.
Theoni Srith Nanklaren/Bubblegum Crisis/Rollerblade Macro EQ/Stego 
Quare tristis es anima mea, et quare conturbas me?