And Elvis said ……… ……Let there be Light

The Visible Spectrum

Prism and colors

Light and Matter Transparent –materials that transmit light waves. Transparent –materials that transmit light waves. Translucent – materials that transmit light but do not permit objects to be seen clearly. Translucent – materials that transmit light but do not permit objects to be seen clearly. Opaque – Materials that absorb or reflect all the light waves that fall on them. Opaque – Materials that absorb or reflect all the light waves that fall on them.

Waves: Light and Color Light provides a great variety of information. The eye can detect tiny changes in the size, brightness and color of an object. A hand against a white wall illuminated by the colors red, blue and green would show the varieties of the colors both on the hand as well as displaying multicolored shadows on the wall.

RED ORANGE YELLOW GREEN BLUE INDIGO VIOLET R RED O ORANGE Y YELLOW G GREEN BBLUE I INDIGO V VIOLET AND ARE THE COLORS OF THE SPECTRUM

PRIMARY COLORS OF LIGHT WAVES GREEN BLUE RED

Additive Process of Primary Colors RED AND BLUE =RED AND BLUE = magenta RED AND GREEN= BLUE AND GREEN = yellow cyan * magenta, yellow and cyan are secondary colors

Complementary colors of light Light of a color and its Complementary Color add to produce White light. If yellow light = red and green and yellow + blue = white then yellow is complementary to blue Cyan and red are complementary colors Magenta and green are complementary colors

Newton Color Wheel

Pigments and Dyes A dye is a molecule that absorbs certain wavelengths of light and transmits or reflects others. A dye is a molecule that absorbs certain wavelengths of light and transmits or reflects others. A pigment is like a dye. It is colored material that absorbs certain colors and transmits or reflects others. A pigment particle is larger than a molecule and can be seen with a microscope. A pigment is like a dye. It is colored material that absorbs certain colors and transmits or reflects others. A pigment particle is larger than a molecule and can be seen with a microscope.

Subtractive Process The absorption of light forms colors by the subtractive process. The absorption of light forms colors by the subtractive process. Molecules in pigments and dyes absorb certain colors from white light. Molecules in pigments and dyes absorb certain colors from white light. A pigment that absorbs only one color from white light is called Primary Pigment. A pigment that absorbs only one color from white light is called Primary Pigment.

Primary Colors of Pigments yellow magenta cyan

SECONDARY PIGMENT COLORS A pigment that absorbs two primary colors and reflects one is a secondary pigment. A pigment that absorbs two primary colors and reflects one is a secondary pigment. redgreenblue Note that the primary pigment colors are the secondary light colors.

Complementary Pigment Colors The primary pigment yellow absorbs blue light. If it is mixed with the secondary pigment blue that absorbs green and red light, all light will be absorbed. No light will be reflected, so the result will be black. Yellow and blue are called complementary pigments. Cyan and red, as well as magenta and green, are also complementary pigments.

Conclusion and Review White light is a combination of the spectrum of colors, each having a different wavelength. White light is a combination of the spectrum of colors, each having a different wavelength. Primary colors in light are red, blue and green. Primary colors of pigments are yellow, cyan and magenta. Primary colors in light are red, blue and green. Primary colors of pigments are yellow, cyan and magenta.