Home » Optics » Additive color

### Make new colors by adding beams of light

RGB: red, green, blue

### Making new colors by adding pigments (dyes, inks, paints)

CMYK: Cyan, Magenta, Yellow, Black

### This lesson is on the additive color model.

This lesson is from Apple Valley High School
http://www.district196.org/avhs/dept/science/physics/physicsweb04/AVHSPhysics/color-notes.html

## Additive color: mixing beams of colored light

### Note: All of this is ONLY for mixing rays of light. If you try mixing pigments (the colored chemicals in paints, crayons, dyes, markers, etc) we will get totally different results.

Looking at a white object in a white light

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## Problems

When three colored lamps, red, blue and green, illuminate a physics instructor in front of a white screen in a dark room, three slightly overlapping shadows appear. Specify the colors in regions 1 through 6.

## External lessons

PhET lab color vision

Additive and Subtractive Color in early color movies

http://www.widescreenmuseum.com/oldcolor/oldcolor.htm

# Learning Standards

SAT subject test in Physics: Waves and optics
• Physical optics, such as single-slit diffraction, double-slit interference, polarization, and color.

Massachusetts Arts Curriculum Framework: The Practice Of Creating
PreK- 4 Visual Arts Standards – Identify primary and secondary colors; predict and demonstrate the effects of blending or overlapping primary colors; demonstrate knowledge of making dark to light values of colors. Identify and use basic two-dimensional hollow and solid geometric shapes (circle, triangle, square, rectangle) and three-dimensional forms (sphere, pyramid, cube).

Grades 5-8 Visual Arts Standards – Create compositions that reflect knowledge of the elements and principles of art, i.e., line, color, form, texture; balance, repetition, rhythm, scale, and proportion. Demonstrate the ability to apply elements and principles of art to graphic, textile, product, and architectural design.

Massachusetts Arts Curriculum Framework
The Arts Disciplines: Visual Arts
PreK–12 STANDARD 2: Elements and Principles of Design

By the end of Grade 4: 2.1 Students will, for color, explore and experiment with the use of color in dry and wet media Identify primary and secondary colors and gradations of black, white and gray in the environment and artwork.
By the end of Grade 8: 2.7 Students will, for color, use and be able to identify hues, values, intermediate shades, tints, tones, complementary, analogous, and monochromatic colors. Demonstrate awareness of color by painting objective studies from life and freeform
abstractions that employ relative properties of color