1. Seeing Color Examples
3. White objects appear white because they reflect all the colors of the visible spectrum.

2. Primary Colors of Light
Even though the visible spectrum consists of seven different colors, all of the color seen by the human eye is a mixture of the three primary colors: red, green, and blue.

3. Primary Colors of Light
Red, green, and blue are the primary additive colors. When mixed together in different proportions, you can make just about any color. When mixed in equal proportions (added together), the three primary colors yield white light.

4. Primary Colors of Light
A pigment is a colored material that absorbs some colors and reflects others. The primary pigments are:
1. magenta
2. yellow
3. cyan

5. Primary Colors of Light
Cyan, Magenta, and Yellow are the primary subtractive colors. These colors are combined to produce print media and photographic film. When the subtractive primary colors magenta, cyan, and yellow are added together, they form the color black.

6. HOW THE HUMAN EYE SEES COLOR
Color blindness occurs because one or more sets of cones do not function correctly.
Try these tests.
with 10

7. Eye correctly focusing on the retina7

8. Nearsightedness Eyeball is too long or the cornea bulges
Image is focuses before it reaches
the retina
Corrected with concave lenses 8

10. Nearsightedness
Incorrect Focal point
Correct Focal point

12. Farsightedness Eyeball is too short Image is focuses behind the retina
Corrected with convex lenses 12

13. Farsightedness
focused incorrectly
focused correctly

14. Farsightedness

15. Farsightedness

16. Prisms & Rainbows
Prisms: Separates white light into its component colors. The longer the wavelength, the less it will be bent by the prism.
Rainbows- light shining thru tiny droplets of water, each droplet acts as a prism

17. Interactions of Waves
Refraction – The bending of a wave due to the wave moving from one type of medium into another. 1. As light rays enter a new
medium the cause light to bend
2. The denser the medium –
the slower the light travels

18. Interactions of Waves Reflection – Bounce back wave
–Angle of Incidence is the angle of the wave coming into the object reflecting the wave.
–Angle of Reflection is the angle bouncing off and going away from the object

21. Interactions of Waves
•Diffraction – Wave passing a barrier or going through a hole in a barrier bends and causes the wave to wrap around the

23. Astigmatism Surface of the cornea is curved unevenly
Image is not focused in the right place
Corrected with a combination of
lenses 23