different frequencies of “visible light”
DESCRIPTION
Mystery ShadowsTRANSCRIPT
What is it?What is it?
Different frequencies of “visible light”Different frequencies of “visible light”
Mystery ShadowsMystery Shadows
Color Mixing with Light (Color Addition)Color Mixing with Light (Color Addition)
REDRED BLUEBLUE
GREENGREEN
B + GB + GR + GR + G
R + BR + B
R + B + GR + B + G
CyanCyanYellowYellow
MagentaMagenta
WhiteWhite
RedRed and and BlueBlue are polarized are polarized verticallyvertically, , and and GreenGreen is polarized is polarized horizontallyhorizontally..
Orientation of LightOrientation of Light
We will represent light by simply looking We will represent light by simply looking at the electric field… even though the at the electric field… even though the
magnetic field is still presentmagnetic field is still present
Vertical OrientationVertical Orientation
Horizontal OrientationHorizontal Orientation
PolarizationPolarization
Polarized Light Polarized Light ≡ Light that is ≡ Light that is of all the SAME orientationof all the SAME orientation
http://www.computer-music.com/images/bryce/Don061%20Fence%20Picket%20White%20(posed).jpg
Polarizing FiltersPolarizing Filters
Which direction should this fisherman’s Which direction should this fisherman’s glasses be polarized to see fish better?glasses be polarized to see fish better?
http://www.flyfishusa.com/newsletter/060103/
http://www.mosquitocreekoutdoors.com/cgi-bin/SoftCart.exe/valorium.html?E+scstore
AABB
CC DD
http://www.exo.net/~pauld/summer_institute/summer_day6color/color_shadow_2.gif
BlueBlueGreenGreenRedRedWhat color What color
is each is each light can light can
producing?producing?
AABB CC
DRAW IT!!!DRAW IT!!!
What Temperature What Temperature do these seem?do these seem?
http://www.gelighting.com/na/home_lighting/products/reveal_tour/redecorating_tips.pdf
So, objects appear the color they So, objects appear the color they are because…are because…
The objects only reflect particular The objects only reflect particular frequencies (colors) of lightfrequencies (colors) of light
WHITE
RED
GREEN
BLUE
CYAN
MAGENTA
YELLOW
Refle
cts
Refle
cts
Gre
enGr
een
// Blu
eBl
ue
Abso
rbs
Abso
rbs R
EDRED Reflects
Reflects
BlueBlue // Red
Red
Absorbs
Absorbs GREENGREEN
ReflectsReflectsGreenGreen // RedRed
AbsorbsAbsorbs BLUEBLUE
Color Mixing with Pigment (Color Subtraction)Color Mixing with Pigment (Color Subtraction)
What colors What colors would appear would appear when mixed?when mixed?
Color Color SUBTRACTION SUBTRACTION
(pigments)(pigments)
ColorColorADDITIONADDITION
(light)(light)
RGBRGB CMYKCMYK
http://micro.magnet.fsu.edu/primer/java/primarycolors/colorseparation/
http://h0060089ab5de.ne.client2.attbi.com/wallpaper/Pics/Penguins%20on%20a%20Cold%20Perch.JPG