Lesson Plans Light Properties (University of California - Battle) Provides a lesson to study the properties of light, especially as applied to astronomy. 3-01 Multimedia Relativity (Time) Provides audio of Einstein explaining that energy equals mass times the velocity of light squared. 1-00 News Light Waves Used for Database Searches (Macmillan Publishers - Nature - Ball) Describes a process for using light waves to conduct searches for data on a computer, expected to yield a billion-fold increase in speed over current electronics-based searches. 5-01 Papers Color Basics - Primary Colors (Parker) Provides information on mixing colors. When mixing light, the primary colors are red, blue, and green. When mixing paint, which this article discusses, the primary colors are yellow, magenta, and cyan. However, true magenta and cyan have not historically been available. "In the absence of magenta and cyan, red and blue can sort of be used as primary colors...." 9-01 Infrared Photovoltaic Cells (J X Crystals) Describes a new cell, thermophotovoltaic (TPV), that converts infrared light into electricity. It can be used in a furnace, for example, to convert wasted infrared heat into additional electricity. 6-01 Light - Implications If It Can Vary in Speed (New Scientist) Provides a summary of cosmological problems that may be solvable if light can, in fact, vary in speed. 7-00 Light - Properties of Light (Encyclozine.com) Provides basic information on the nature of light and defines key terms. 5-01 Light - Speed of Light (PhysLink.com) Provides an explanation on how the speed of light is measured, as well as describing its speed in several forms. 8-01 Light - Speed of Light May Be Changing (New Scientist) Provides a summary of research that shows that the speed of light, one of the most important constants in physics and astronomy, may be changing. 8-01 Light-Years (Discovery.com) Describes light-years, a unit of measurement to stars and other distant bodies in space. Visitors sometimes call it light years. 3-02 Photon Measurement (Nature) Provides news on a devise that measures photons in the far-infrared spectrum of light. It is 10,000 times more powerful than previous devices. Quantum Primer (Simon Fraser University - Lower) Provides an explanation of quantum theory as it applies to light, waves, electrons, and more. 2-00 Telescopes - A History and How They Work (Peter Piper Publishing) Provides a short history of telescopes and describes how they work. 6-02 Telescopes - A History and How They Work (Peter Piper Publishing) Provides a short history of telescopes and describes how they work. 6-02 Projects Colors and Heat (Blackout) Provides a project to demonstrate the relationship between colors in light from the sun and heat. 3-02 Discover the Colors of White Light (NASA Langley Research Center - SCIence Files) Provides a project to determine the colors in white light. (NASA has changed the name of this education site from Why Files to SCIence Files) 3-02 Reflection of Light in Water (NASA Langley Research Center - SCIence Files) Provides a project to understand how light is reflected. 3-02

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