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Colors

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by

Karen Fe Trono

on 26 February 2014

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Transcript of Colors

C

O

L

O

R

S

Group 11
IV - St. Irene

What is
C
o
l
o
r
?
Color is a physiological experience and is in the eye of the beholder. The colors we see depend on the frequency of the light we see.
40 - Francesca Tadeo
41 - Karen Fe Trono
42 - Angeline Valdez

Red
- lowest frequency
Violet
- highest frequency
* Between them range the infinite number of hues that make up the color spectrum
Isaac Newton
He was the first who studied colors

Discovered the color spectrum through a prism
What is
S
p
e
c
t
r
u
m
?
Spectrum is the spread of colors
(ROYGBIV)
Black and White are NOT colors
White Light
the mixture of all colors (ROYGBIV)

Black
the absence of light
Sel
ect
ive

Abs
orp
tio
n of

Lig
ht
Light wave hits the atom --> electrons vibrates --> the light frequency that matches the frequency of the electrons will be absorbed --> the unmatched light frequencies will be reflected or be transmitted
Col
or b
y Re
fle
cti
on
Col
or b
y Tr
ans
mis
sio
n
Col
or A
ddi
tio
n
The colors of the objects depends on the kind of light used
Primary Colors of Light:
Red
Blue
Green
Secondary Colors of Light:
Yellow
Magenta
Cyan
Red
+
Green
+
Yellow
Blue
+
Red
=
Magenta
Green
+
Blue
=
Cyan
Com
ple
men
tar
y Co
lor
s of

Lig
ht
Red
and
Cyan
Red + (Blue + Green) = White

Blue
and
Yellow
Blue + (Green + Red) = White

Green
and
Magenta
Green + (Red + Blue) = White
Pigments
Such chemicals that are capable of selectively absorbing one or more frequencies of white light
White -
Blue
= ?
(Red + Blue + Green) - Blue = ?
Red + Blue = Yellow

White -
Blue
=
Yellow
Cyan
-
Blue
= ?
(Green + Blue) - Blue = ?

Cyan
-
Blue
=
Green
Com
ple
men
tar
y Co
lor
s an
d Co
lor

Sub
tra
cti
on
Pure pigment - a pigment that absorbs a single frequency

"Pigments absorb light. Pure pigments absorb a single frequency or color of light.
The color of light absorbed by a pigment is merely the complementary color of that pigment."
Col
or S
ubt
rac
tio
n
Primary Colors of Pigments:
Yellow
Magenta
Cyan
Secondary Colors of Pigments:
Red
Blue
Green
Yellow
removes
Blue
color
Magenta
removes
Green
color
Cyan
removes
Red
color
Pure Blue Pigments
+
Yellow
= Black
Blue + (Red + Green) = Black
Pure Green Pigments
+
Magenta
= Black
Green + (Blue + Red) = Black
Pure Red Pigments
+ Cyan = Black
Red + (Green + Blue) = Black
Example 1
Magenta light shines on a sheet
of paper containing a yellow pigment.
Determine the appearance of the paper.
Magenta
-
Blue
= ?
(Red + Blue) - Blue

Magenta
-
Blue
=
Red
Example 2
Yellow light shines on a sheet
of paper containing a red pigment.
Determine the appearance of the paper.
Yellow
-
Green
= ?
(Green + Red) - Green = ?

Yellow
-
Green
=
Red
Example 3
Yellow light shines on a sheet
of paper containing a blue pigment.
Determine the appearance of the paper.
Yellow
-
Yellow
= Black
Full transcript