1. The frequency of visible light that is reflected by an object.
COLOR
The frequency of visible light that is reflected by an object.

2. Black absorbs all light. Ex: solar heaters
White reflects all light. Ex: summer clothes

3. Fun with color
Clothes reflect the color they are and absorb other colors. What happens if the color of light isn’t present?

4. FILTERS
Allows only one color to pass through and absorbs all other color.

5. MIXING LIGHT
Primary colors: Colors that produce white light when combined. (Red, Blue, Green)
Complementary light: Two colors that combine to make white light. (blue + yellow, green + magenta, red + cyan)

6. Mixing light is an additive process
Mixing light is an additive process. As you add color, more is reflected back. If you mix all of the colors, all light is reflected back as white light.

8. Pigment
Mixing pigment is a subtractive process. The more color added, less color is reflected back. It’s absorbed instead. All combine to form black.

9. White Light
White light is made of several colors so it is polychromatic.
Dispersion is the process of separating white light into the different colors of the spectrum.

10. TYPES OF SPECTRUMS
Continuous spectrum- colors blend from one to the other. Produced by an incandescent source.
Bright Line Spectrum- band of color separated by dark areas. Produced by a hot gas.
Dark line spectrum-(absorption spectrum)-continuous spectrum with dark band. Produced by a cool gas placed in front of an incandescent light

11. Continuous spectrum
Bright Line Spectrum
Dark Line spectrum

12. RED SHIFT
If the light source moves towards you the color shifts blue. If it is moving away the color shift red.

13. RED SHIFT
Can be used to determine how a star or planet is rotating. The light from the side moving away shifts red while the side moving towards you shifts blue.

14. HOME WORK READ 381-388 IN TEXT BOOK 16.2 SECTION REVIEW ON PG 388
AND PG 389 #10-15