1. Science Olympiad
Optics
Color and Shadows

2. The Electromagnetic Spectrum.

3. Behavior of Light: Shadows - One Light Bulb
Use rays to predict what one would observe if there was one light source.
Draw the “kissing” rays.
The rays that just clear the barrier.
Light
Shadow
Barrier
Light
So, what do we see on the screen?

4. Behavior of Light: Shadows - One Light Bulb
Use rays to predict what one would observe if there was one light source.
There are many rays that leave the light bulb that go in all directions.
Light
Shadow
Barrier
Light

5. Behavior of Light - Two Light Bulbs
Use rays to predict what one would observe if there were two light sources.
Light
Draw the “kissing” rays from bulb, B1.
Shadow
Partial
Bulb1
Draw the “kissing” rays from bulb, B2.
Full (Dark)
Shadow
Shadow
Partial
Bulb2
Shadow from bulb, B1 and light from Bulb, B2.
So, what do we see on the screen?
Light

6. So, what do we see on the screen? Light Green Red and
Behavior of Light - Two Light Bulbs
Use rays to predict what one would observe if there were two light sources of different colors.
Light
Green
Red
and
Shadow
Partial
Green
Full (Dark)
Shadow
Shadow
Partial
Red
So, what do we see on the screen?
Light
Green
Red
and

7. Let’s review where the light shines.
Behavior of Light - Two Light Bulbs
Use rays to predict what one would observe if there were two light sources of different colors.
Full (Dark)
Shadow
Partial
Red
Light
Green
and
Let’s review where the light shines.

8. Color By Addition. ~ Light!

9. RED + BLUE + GREEN = WHITE
Color by addition.
Blue, red and green light from three different projectors.
RED + GREEN = YELLOW
RED + BLUE = MAGENTA
BLUE + GREEN = CYAN
RED + BLUE + GREEN = WHITE

10. Now you try this one and then I will show you the results.
RED
GREEN
Now you try this one and then I will show you the results.

11. RED
SHADOW

12. Yellow
RED
Green

13. White
Yellow
Magenta
Cyan
RED + BLUE = MAGENTA
RED + GREEN = YELLOW
BLUE + GREEN = CYAN
RED + BLUE + GREEN = WHITE

16. The END!