This student is looking at many colors on his computer screen This student is looking at many colors on his computer screen. What he is actually seeing, however, are combinations of only three colors of light.

Key Concepts How does a prism separate white light? What determines the color of an object? What are the primary colors of light? What are the primary colors of pigments?

After passing the prism, which color of visible light bends the most? Key Concepts As white light passes through a prism, shorter wavelengths refract __________ than longer wavelengths, and the colors separate. more After passing the prism, which color of visible light bends the most? violet

And which color bends the least? Key Concepts And which color bends the least? red

Separating White Light Into Colors Sunlight is made up of ______ the colors of the visible spectrum. The process in which white light separates into colors is called _________________. A rainbow forms when droplets of __________ in the air act like prisms. all dispersion water

Separating White Light Into Colors When light __________ a raindrop, it slows down and refracts. Then it reflects off the far inner ______________ of the raindrop. It refracts again as it __________ the raindrop, speeds up, and travels back toward the source of the light. enters surface leaves

The color of any object depends on… what the object is ____________ of The Colors of Objects The color of any object depends on… what the object is ____________ of on the color of __________ that strikes the object. made light and how your own eyes work!

The Colors of Objects An object’s color is the color of light that reaches your _________ when you look at the object. Sunlight contains all the colors of the visible spectrum. A red car in sunlight ____________ mostly ________ light. Most of the rest of the light is ________________ at the surface of the paint. eyes reflects red absorbed

Only the colors that are ________________ can be reflected. The Colors of Objects What happens if you change the color of the light shining on an object? Only the colors that are ________________ can be reflected. in the light

What are the primary colors of light? Mixing Colors of Light What are the primary colors of light? Primary colors are three specific colors that can be _________________ in varying amounts to create all possible colors. combined The primary colors of light are _________, ___________, and ___________. red green blue

When any two primary colors combine, a ____________ color is formed. Mixing Colors of Light When any two primary colors combine, a ____________ color is formed. What secondary color do green and red light produce? When red, green, and blue light combine, what color results? secondary yellow white

Each secondary color of light is a combination of two primary colors. The Colors of Objects Each secondary color of light is a combination of two primary colors. The secondary colors of light are ____________, ______________, and _________________. cyan yellow magenta

Two colors of light that combine to form white light are The Colors of Objects If you add a ________________ color to the proper ________________ color, you will get white light. Two colors of light that combine to form white light are ___________________ colors of light. primary secondary complementary

The primary colors of ______________ are cyan, yellow, and magenta. Mixing Pigments The primary colors of ______________ are cyan, yellow, and magenta. pigment A pigment is a material that ______________ some colors of light and ___________ other colors. Paints, inks, photographs, and dyes get their colors from pigments. reflects absorb

Mixing Pigments When all of the pigments mix together, what color do they produce? And when magenta and cyan mix? Cyan and yellow? Yellow and magenta? black blue green red

A prism separates white light into the visible spectrum because Assessment Questions A prism separates white light into the visible spectrum because longer wavelengths are absorbed more than shorter wavelengths. shorter wavelengths refract more than longer wavelengths. shorter wavelengths reflect more than longer wavelengths. longer wavelengths experience more interference.

The color of an object depends on what the object is made of and on Assessment Questions The color of an object depends on what the object is made of and on the intensity of light that strikes the object. the color of light that strikes the object. the direction of the light that strikes the object. the speed of the light that strikes the object.

Which of these colors is one of the primary colors of light? Assessment Questions Which of these colors is one of the primary colors of light? green magenta yellow white