light!light! energy! color! jackie lasek, tim lorelli, kirsten rossi-porcelli ed 713.22, summer 2008...
TRANSCRIPT
Light!Light!Light!Light!Energy! Energy! Color!Color!
Jackie Lasek, Tim Lorelli, Kirsten Rossi-PorcelliED 713.22, Summer 2008
Dr. Sharon Anne O’Connor-Petruso
Unit Overview• Scavenger Hunt
• How does light travel?
• All about shadows
• What is the color of light?
• Color mixing
• Color perception
Scavenger HuntHow does light effect the world around us?What would our world be like without light?
What are we really seeing when we look at an object? What is color?Find out at http://www.colormatters.com/seecolor.html
How does light travel? What makes light change directions?Find out at http://www.opticalres.com/optics_for_kids/kidoptx_p1.html
What is photosynthesis? How does light help us eat?Find out at http://www.shaunbryer.com
http://www.kn.att.com/wired/fil/pages/listlighteti.htmlFilamentality site:
Scavenger HuntHow does light effect the world around us?What would our world be like without light?
How does light effect weather?Find out at http://www.usatoday.com
What is a shadow?Find out at http://www.wikipedia.org
What are the different types of energy?Find out at http://www.energyinfonz.co.nz/home/KidsZone/Energybasics/index.html
http://www.kn.att.com/wired/fil/pages/listlighteti.htmlFilamentality site:
Read this blog! Watch this!
Shadow FactsShadow Facts• Whenever light is blocked, a
shadow is formed.• Did you know that a shadow
starts where the light is blocked so your shadow starts at your feet!
• When the sun is directly above you, there is little to no shadow because the light from the sun is hitting all the area around you.
• The length of a shadow constantly changes as the earth rotates on its axis away from the sun. In the morning, your shadow is longer than you! In the afternoon, it is much smaller than you!
Rays of light
0
10
20
30
40
50
60
70
80
90
Jen Katie
10:00 AM2:00 PM
Measurement of shadows
He
igh
t (i
nch
es
)
Which shadow is longer?We can analyze the graph to find out!
Red • Orange • Yellow • Green • Blue • Indigo • Violet
Color SpectrumWhat is the color of light?
QuickTime™ and aMotion JPEG OpenDML decompressor
are needed to see this picture.
Adding blue and red makes magenta
Adding blue and green makes cyan
Adding all three makes white
again
Adding red and green makes yellow
Color Mixing• Looking at a color through a different colored lens changes the color’s appearance. Please see our Mystery Box!• Mixing colors results in a variety of new colors.• Virtually all colors are a mixture of the primary colors of light (red, green, blue).
Color PerceptionColor PerceptionHow do we see color?
• Color originates in light.• Humans perceive sunlight as colorless.• Color-detecting equipment inside the eye is called a “cone.”• The number of visible colors is defined by the kinds of cones in the eye.• When light shines on an object, the eye receives the reflected light and sends a message to the brain to see the color.