Transcript Color and Light Demos - Health-Science-Technology-2010-2011

Color, Vision, and
Visual Distortions
The Primary Colors of Light
RED
BLUE
GREEN
• The primary colors of light are red, blue,
and green unlike the primary colors of
paint (red, blue and yellow) you learned
in elementary school.
Red + Blue = Magenta
Blue + Green = Cyan
Red + Green = Yellow
Red + Blue + Green = White
• Two colors of light that can be added
together to form white light.
• Complementary colors are the
combination of a primary color of light
plus a secondary color of light.
Magenta + Green = White
Blue + Yellow = White
Cyan + Red = White
• Black is not a color but the absence
of all colors (light).
• The human eye has cone cells for
detecting red, blue, and green light.
These cells are used for daylight vision.
• Rod cells are used in night vision since
they detect only light and dark.
Stare at the center of the circle
in the next slide.
Cyan is composed of blue and
green. After staring at cyan for
a long time, you have exhausted
the blue and green cone cells in
your eye. Therefore, you see
red after staring at cyan.
When have you ever
experienced this phenomenon?
When someone takes your
picture using a flashbulb, you
see black spots. The flashbulb
exhausted all of the cone cells
in your eye so none of them
were working for a few
moments.
Stare at the center of the circle
in the next slide.
Yellow is composed of red and
green. After staring at yellow
for a long time, you have
exhausted the red and green
cone cells in your eyes.
Therefore, you see blue after
staring at yellow.
Stare at the center of the circle
in the next slide.
Magenta is composed of red
and blue. After staring at
magenta for a long time, you
have exhausted the red and
blue cone cells. Therefore, you
see green after staring at
magenta.
Your eyes are capable of more
complicated shapes than circles.
Stare at the center of the heart
on the next slide.
You should have seen a red
heart after staring at the cyan
heart since you have exhausted
the green and blue cone cells
from staring at cyan.
Stare at the center of the next
slide.
You should have seen a green
smiley face since your blue and
red cone cells were exhausted
from staring at the magenta
smiley face.
Your eyes are capable of
resolving an even more
complicated picture. Stare at
the center of the next slide.
Your eyes are capable of
resolving an even more
complicated picture. Stare at
the center of the next slide.
The U.S. flag was originally
cyan, yellow and black.
After it was removed it
appeared red, white, and
blue.
Stare at the center of the even
more complicated picture.
• Color blindness usually involves the
colors of red and green.
• Color blindness is found in 4% of the
male population and 0.25% of the
female population.
• Color blindness is a sex linked recessive
genetic trait that appears on the X
chromosome.
• Since men have only one X chromosome,
if the gene for color blindness appears on
it, they will be color blind.
• Women have two X chromosomes and it
would have to appear on both X
chromosomes before the woman would
exhibit the trait.
What do you see in the next
slide?
• Everyone should have seen the
number 25.
What do you see in the next
slide?
• If you have normal vision you should see
the number 29.
• If you are red-green color blind you will
probably only see spots.
What do you see in the next
slide?
• If you have normal vision you should see
the number 45.
• If you are red-green color blind you will
probably only see spots.
What do you see in the next
slide?
• Everyone should see the number 56.
What do you see in the next
slide?
• If you have normal vision you should see
the number 6.
• If you are red - green color blind you will
probably only see spots.
What do you see in the next
slide?
• If you have normal vision you should see
the number 8.
• If you are red - green color blind you will
probably only see spots.
What NUMBER do you see in
the next slide?
• The individual with normal color vision
will see a 5 revealed in the dot pattern.
• An individual with red - green (the most
common) color blindness will see a 2
revealed in the dots.
• Can you
find the
old
woman
and the
young
girl?
• The old
woman is
facing the
left and
wearing a
fur coat.
• The
young
woman is
facing the
back and
wearing a
necklace.
• Can you find the rabbit and the duck?
• The duck is facing the left and the rabbit
is facing the right.
• How many tines are there?
• Notice what looks like a tine one the left
turns into empty space at the right.
• What
makes
up the
front of
the
crate?
• Notice
how what
is an
inside
piece on
the
bottom
right
turns into
an outside
piece on
the
bottom
left.
• Are the two
lines equal in
length?
• YES they are the
same length. They
appear different
lengths because of
the arrow heads
connected to them.
• What do you
see?
• You should see the
word LIAR
written in cursive
and a person’s
face.
• Stare at the red parrot for 20 seconds. Then
look at the bird cage. You should be able to see
the image of a cyan bird in the cage. Then
stare at the green parrot for 20 seconds. Then
look at the bird cage. You should now see a
magenta bird in the cage.
• What do
you see?
• There is an
Eskimo
turned
away from
you or an
Indian
facing left.
• Each
different
picture
represents
the change of
just one line
and it
transforms
the face into
a woman
kneeling and
facing the
right side.
• What do
you see?
• You should
be able to
see a
woman’s
face or a
person
playing a
saxophone.
• What
do you
see?
• How
many
faces do
you see?
• There are
three faces
there. Two
are facing
each other
and the
third is
facing
forward.
• How many
legs does
the
elephant
have?
• Some of what
appear to be
feet at the
bottom of the
diagram turn
into space at
the top and
what appears
to be legs
leaving the
body turn into
free space at
the bottom.
• What do
you see
in the
picture?
• You
should be
able to
see a
woman
looking in
a vanity
mirror or
a skull.
• What do
you see?
• You should
be able to
see a vase
or two
people
facing each
other.
• How many
people can
you see?
• There are
9 people
in the
picture.
• What color
are the
horsemen?
• There are off
white
horsemen
moving to the
left and brown
horsemen
moving to the
left.