1. Electromagnetic spectrum and visible light
What is each color made of?
Which color carries the most energy? How do you know?

2. How your eye sees color Photons hit the retina
The retina contains two types of cells: rods and cones.
Rods process vision in low light - black, white, and shades of grey
Cones process color vision and detail
When photons collide with these cells chemical reactions occur and an electrical signal is sent along the optic nerve to the brain.
The retina contains 100 million rods and 7 million cones.

3. Reflected Color – color made from photons that reflect from objects
Emitted color – photons of different color are made and released
Refracted Color – color is made when white light travels through a different medium and refracts
Reflected Color – color made from photons that reflect from objects
Ideas???

4. Emitted color
Photons with different energies will appear different colors
Emitted photons made from:
Chemical reactions
Stars
Red – lower temperature/less energy/ longer wavelength
Blue – higher temperature/more energy/ shorter wavelength
Binary stars in Cygnus: Albireo A & B (380ly)

5. Fireworks – which color has the most energy?

6. Fire – a chemical reaction
Which color would have the shorter wavelength?
Which color would carry the most energy?

7. Refracted Color Which color has the highest frequency?
How does white light turn into colored light?

8. Refracted Color
Red is slower (lower frequency) with less energy so red refracts or bends at a smaller angle (bends less)
Purple or Violet is faster (higher frequency) with more energy so purple refracts or bends at a larger angle (bends more)

9. Rainbows: reflection & refraction

10. Reflected Color or Why is your shirt red?
All white light is made of the following colors (ROYGBV)
Red
Orange
Yellow
Green
Blue
Violet (purple)
white light (visible) lands on an object
some photons are absorbed by the object
some of the photons are reflected by the object.
reflected photons are what we see; the energy color of the photons.
objects are different colors; because they reflect some colors but absorb other colors.
(quiz)

11. Why is it that color?