🚀 go-pugleaf

In <E5pJ05.909@snugbug.cts.com> jott@snugbug.cts.com (Joan Tine)
writes: 
>
>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
>
>
I think we were trying to keep the conversation simple (there's a goal
unachieved!) by restricing ourselves to gels instead of getting into
wavelenghts and vibrations! Simply, we were discussing the "primary"
colors as the refer to the additive way of achieving them (ie different
beems of light shown in different combinations), and the point of it
being that green, red and blue are primary because they create white
light - all colors combined (as apposed to black, the total absense of
light). My physics teacher refered to them as the "primary colors" and
took the time to teach this system to us, so this can't be *quite* as
pointless as you make out.

M. Moore