Perception of color derives from the stimulation of what?
A: Cone cells in the human eye by electromagnetic radiation in the visible spectrum.
Which hair color graces the heads of one in 16 Americans?
What black and white movie was the first to be converted to color
A: Yankee Doodle Dandy.
How long was it between Paul Newman's making of The Hustler, and
it's sequel The color of Money?
A: 25 years.
The science of color is sometimes called what?
A: Chromatics, colorimetry, or simply color science.
What movie in 1986, had 11 Oscar nominations and won none?
A: The Color Purple.
Yul Brynner's hair, when he had hair, was what color?
A: Dark Brown
On TWA flight 800, what actual color were the "black boxes"?
From what element does turquoise derive its distinctive color?
A: Traces of copper.
What are the color-sensitive cells in the eye called?
Neptune gets its blue color from what gas?
How many colors are there in the spectrum when white light is
What brand camcorder was the first to have a color LCD screen
instead of a viewfinder?
On the cover of Sweet Baby James, what color shirt does James
The color of an object
depends on both the physics of the object in its
environment and the characteristics of the what?
A: Perceiving eye and brain.
Physically, objects can be
said to have the color of the light leaving
their surfaces, which normally depends on what?
A: The spectrum of the incident illumination and
the reflectance properties of the surface, as
well as potentially on the angles of
illumination and viewing.
Some objects not only
reflect light, but also what?
A: Transmit light or emit light themselves,
which also contributes to the color.
Light arriving at an opaque
surface is either reflected "specularly" (that
is, in the manner of a mirror), scattered (that
is, reflected with diffuse scattering), or what?
A: Absorbed – or some combination of these.
Opaque objects that do not
reflect specularly have their color determined
A: Which wavelengths of light they scatter
If objects scatter all
wavelengths with roughly equal strength, they
If they absorb all
wavelengths, they appear what?
If objects scatter all wavelengths with roughly
equal strength, they appear what?
If they absorb all wavelengths, they appear
Although Aristotle and other ancient scientists
had already written on the nature of light and
color vision, it was not until whom that light
was identified as the source of the color
Humans are trichromatic—the
retina contains how many types of color receptor
cells, or cones?
One type, relatively
distinct from the other two, is most responsive
to light that is perceived as blue or
blue-violet, with wavelengths around 450 nm;
cones of this type are sometimes called what?
A: Short-wavelength cones, S cones, or blue
The other two types are
closely related genetically and chemically:
middle-wavelength cones, M cones, or green cones
are most sensitive to light perceived as what?
A: Green, with wavelengths around 540 nm.
The long-wavelength cones,
L cones, or red cones, are most sensitive to
light is perceived as what?
A: Greenish yellow, with wavelengths around 570
Light, no matter how
complex its composition of wavelengths, is
reduced to how many color components by the eye?
Each cone type adheres to
the principle of what?
A: Univariance, which is that each cone's output
is determined by the amount of light that falls
on it over all wavelengths.
For each location in the
visual field, the three types of cones yield
three signals based on what?
A: The extent to which each is stimulated.
These amounts of
stimulation are sometimes called what?
A: Tristimulus values.
If one or more types of a
person's color-sensing cones are missing or less
responsive than normal to incoming light, that
person can distinguish fewer colors and is said
to be what?
A: Color deficient or color blind.
Almost all color deficient
individuals can distinguish what?
A: At least some colors.
Some kinds of color
deficiency are caused by anomalies in what?
A: The number or nature of cones in the retina.
Others (like central or
cortical achromatopsia) are caused by what?
A: Neural anomalies in those parts of the
where visual processing takes place.
While most humans are
trichromatic (having three types of color
receptors), many animals, known as
tetrachromats, have how many?
A: Four types.
These include some species
of spiders, most marsupials,
and many species of what?
Other species are sensitive
to only two axes of color or do not perceive
color at all; these are called what?
A: Dichromats and monochromats respectively.
As many as half of all
women are retinal what?
The phenomenon arises when
an individual receives two slightly different
copies of the gene for either the medium- or
long-wavelength cones, which are carried on
A: The X chromosome.
To have two different
genes, a person must have two X chromosomes,
which is why the phenomenon only occurs in whom?