Transmission of Light:

Objectives:

    1.    Compare regular and diffuse reflections.

    2.    Explain how the frequency of light affects what happens what happens when it enters a substance.

    3.    Describe opaque materials

Resources:

Notes:

When a light wave comes in contact with an object one of three things can happen.  It can pass through the object, it can be absorbed, or be reflected by the object.  The amount of absorption or reflection is directly related to the elasticity of the material that the light wave is coming in contact with.  Here are some of the things that can happen to the light.

    Transmitted - light waves pass through objects

• Transparent - detail can clearly be seen on the other side (air, window)

• Translucent - transmits light without detail (tissue paper, shower door)

Opaque - light energy is absorbed or reflected by the object

• absorption of visible light - complete absorption creates black objects

• Reflected - regular or diffuse  

    The color of any opaque object is the color that it reflects

• The primary colors of light are - red, blue and green

• Mixing the primary colors creates the primary pigments

•         Primary pigments - yellow, cyan and magenta  

•                 Red + Green = yellow

•                 Red + Blue    = magenta

•                 Blue + Green = cyan

•         Mixing all of the primary pigments creates black 

•                 yellow + cyan = green

•                 yellow + magenta = red

•                 cyan + magenta = blue

•         You can mix pigments and colors to get white.

•                 Magenta + Green = white

•                 Yellow + Blue = white

•                 Cyan + Red = white

•                 Red + Blue + Green = white

(micro.magnet.fsu.edu/primer/ images/primary/munsell.jpg)