1 / 21

C o l o r

C o l o r. Isaac Newton first studied light when he used a piece of glass and first saw the color spectrum. The visible/color spectrum is the ordered arrangement of colors by wavelength and frequency. Spectrum. Color by Reflection.

erik
Download Presentation

C o l o r

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Color

  2. Isaac Newton first studied light when he used a piece of glass and first saw the color spectrum.

  3. The visible/color spectrum is the ordered arrangement of colors by wavelength and frequency

  4. Spectrum

  5. Color by Reflection • Different objects reflect (if material is opaque) and absorb (if the material is transparent)

  6. Color by Transmission • The color of a transparent object depends on the color of the light it transmits • The material in glass that selectively absorbs colored light is pigment. • Glass is colorless since it transmits all visible frequencies.

  7. Light-there are primary and secondary colors of light Primary-Red, Blue, Green (examples-the 3 pixels in your TV) • Secondary-the result of mixing 2 primary colors Red + Blue = Magenta Blue + Green = Cyan Red + Green = Yellow

  8. Adding colors of light is called Color by Addition • White-addition of all colors of the visible spectrum, or by adding the 3 primary colors • Black-absence of light, all 3 lights are blocked

  9. ADDITION OF PRIMARY COLORS • When paints or dyes are mixed, the mixture absorbs the frequencies of the paint or dye

  10. Complementary colors of light-two colors which when added, create white light • Blue + Yellow = White • Red + Cyan = White • Green + Magenta = White So…yellow light is the complementary color to blue light

  11. A Pigment is a colored material that absorbs certain wavelengths of light (certain colors) and transmits or reflects others---Think PAINT

  12. Primary Pigment-A pigment that absorbs only one primary color from white light Yellow (absorbs blue light) Cyan (absorbs red light) Magenta (absorbs green light)

  13. Secondary Pigment-A pigment that absorbs two primary colors and reflects one Red (absorbs green & blue) Blue (absorbs red & green) Green (absorbs red & blue)

  14. PRACTICE

  15. Answers to Practice • Addition of Primary Colors • Red + Green = Yellow • Red + Blue = Magenta • Blue + Green = Cyan

  16. Color by subtraction~the pigment is ‘taking out’ / ‘subtracting’ / ‘absorbing’ a color of light • Complementary Pigments-two colors that when added, will absorb all colors of the spectrum (‘black’ pigment is made) minimal/no light is reflected

  17. Think Mixing Paint… yellow + blue = black cyan + red = black magenta + green = black

  18. PRACTICE

  19. Answers to Practice • Practice A- Magenta is red + blue. Blue is subtracted (absorbed) so that leaves red, shirt appears red • Practice B-red is a primary color, blue is subtracted (absorbed) so it is not present, so shirt appears red • Practice C-Blue is a primary color, blue is subtracted (absorbed) so no color is left, shirt appears Black

  20. Why? • …is the sky blue • Blue is scatted the most during the middle of the day, due to its high frequency and low energy • …are sunsets red • Red, orange, and yellow are scattered more during this time, so red is refracted more, so red, orange, etc if seen

  21. Do problem set in class

More Related