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In The Eye Of The Beholder
What makes your brain tick?
According to researchers, the parts of your body, if you don't use it you lose
it, particularly your brain. The more you use it, the more logic & brainier you
are, could that be true???
If colour is in my head, am I an artist !!!
It has been said that 1 in 10 of us (male) do not see what most see, then I've
to examine my head.
The sky we perceive blue depends on the different frequencies of light
available at the time, the highest frequencies we can detect with our naked eye
appears violet (blue-end) and the lowest frequencies (many times slower than
violet) appear red, and in between these frequencies (colour) appear
'yellowish-GREEN-bluish' colour -- all together they appear white to us, the
visible spectrum.
Everything we see reflect light rather than absorb (well, absorb a bit of the
colour 'frequency' not got), and reflect all other (colours) frequencies (of light) back, the
colours we see are the frequencies of the object's true colour -- thus we perceive
roses are red and their leaves are green.
The sky we perceived blue because the red frequency is slow to reach us and as
the fast ultraviolet frequency of light, after being more effectively scattered by our atmosphere
(nitrogen and oxygen molecules and many other tiny particles in our ozone layer
scattered the ultraviolet light), followed by blue, green, yellow, orange and
red in that order; our eyes are not sensitive to ultraviolet light, thus blue seems
predominate our vision, so we think the sky is blue.
Our brain is also fast to interpret the lower frequencies being least
scattered (not true also being scattered though less effectively than blue) during sun set, since the fast
ultraviolet frequency gone over the outer
edge of the
earth a bit, sunset appears red, orange and yellowish.
The true is at sunset light had sunk below the horizon, atmosphere is thinner
at the top, as light travels faster in thin air and bends the light path to
least-time giving us longer daylight summer time.
Solar frequencies (colours) can best be observed in the
rainbow-colour
spectrum, if you have notice that yellow-green parts of this spectrum are more
intense than other frequencies, this is due to earth DO NOT evenly distribute
all frequencies of light, and our eyes evolved to have maximum sensitivity in
'yellowish-GREEN-bluish' frequency ranges, thus at night we see better with yellowish-white
sodium-vapour lamp than other bluish-green colour lights, and why more countries adopt
contrasting yellow-green bright colour emergency vehicles, particularly near airports where visibility is vital.
Electrons close together vibrate in steps, which results in greater intensity
of scattered light than from the same electrons vibrating separately, thus
clouds are bright. But water is transparent to nearly all visible frequencies of
light, only absorbs a week infrared waves to resonate near the surface and warms
the water on a hot sunny day but not any deeper. The sea look greenish-blue
because weakened frequency in water is cyan-like in colour (greenish-blue
absorbs red-light frequency) thus look
greenish-blue to you, and at night water looks dark even with full moon, only
the surface of water is shiny thus don't step on them, you don't know how deep
the water is.
To survive in the dark, footmen had a saying in the old days...
dark mud, white stone, shiny water ditch.
Things do not emit light yet visible to us because they re-emit light
reaching their surface from a source such as moon light, this light falls on the
surface of materials and either re-emit without change in frequency or
absorb the light for heat or both, depends on the material. Those absorb and
re-emit light where it came from is call reflection, and those bends
light from where it came from is call refraction, such as transparent
material past light from molecule to molecule which bends light.
So on the surface of all the objects around us, the electron cloud of the
atoms undergo slight vibration under the influence of illumination light. These
tiny vibration over a wide frequency range reflect the various colours of light
by which we see these objects, simply put, we say that we see these objects by
the light they reflect.
When material appears white actually reveal the fact that the electrons are
set into vibration at all the visible frequencies, very little absorption
occurs, and what appears black is a different story, except for a bit of
reflection, dark material absorbs all the visible frequencies.
Light will take the most efficient path and travel in a straight line, but if
obstructed by objects, such as a reflective mirror, light will kink it's
straight path, and in water, light will deviate it's path -- in other word,
light will always take the path require the shortest time.
Even under bright sunlight, the amplitudes of these vibrations are less than
1% of the radius of the atomic nucleus, it is these tiny electron vibrations
that re-emit the light by which we see the world.
Author
19/12/2008
Rules of additive mixtures:
The same thought cannot apply to oil paintings as oil pigments are not pure, the
secret of applying light on oil paintings is a dab of lemon yellow on white plus
linseed oil, let oil dry for a month or two then re-apply linseed oil again, the result is
a museum piece.
Note:
For
definitions of painter and artist click the
link.
Or to see some of
my paintings click my.
Mantra: You can't cure brain death but you can prevent
it.
What's the moral in these stories?
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