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!

Where do shadows

come from?

Where ismy shadow?

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

Will you trace my shadow?Will you trace my shadow?

Morning…Noon…

& Night!

Which shadow is longer?We can analyze the table to find out!

Jen Katie

10 AM 83 86

2 PM 57 60

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!

A rainbow A prism

Color SpectrumWhat is the color of light?

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).

What colors can you make?What colors can you make?

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.

We see things because they reflect light into our eyes!

Science Book

Do animals see color as we do?

Humans DogsMonkeys see color just like us!

Did you know that bulls are color blind?They go after the cape because it’s moving,

not because it’s RED!Bees have the best color perception

of all! They see colors that we can’t see!