Libre Text
Libre Texts: Physics: The Ray Model of Light
How is light visible? Examine this source to understand what light is and how it travels. Answer discussion questions and practice problems to better recognize light rays and know their functions.
Physics Classroom
The Physics Classroom: Light Waves and Color: Two Point Source Interference
Students examine the findings of Thomas Young's light experiment, which showed that an interference pattern results when light from two sources meets up while traveling through the same medium.
Physics Classroom
The Physics Classroom: Light Waves/ Color: Other Two Point Source Interference
Where can we experience the phenomenon that light taking two paths from two locations to the same point in space can undergo constructive and destructive interference? There are several answers to these questions and they will be...
Creative Science Centre
Creative Science Centre: Simple High Temperature Light Bulb Thermometer
A very simple electrical resistance thermometer is described that can be built, calibrated and tested in a school laboratory at virtually no cost. With it, flames, focused sunlight and other high temperature sources can be probed. The...
National High Magnetic Field Laboratory
Magnet Academy: Fluorescent Lamp 1934
Compared to incandescent lamps, fluorescent lamps last longer, require less energy and produce less heat, advantages resulting from the different way in which they generate light.
PC Technology Guide
Pc Tech Guide: Scanners
Informative sight detailing the basics of what a scanner is and what it can do.
Digital Public Library of America
Dpla: Electrifying America
This primary source set explores the development, commercialization, and impact of electricity.
Other
Art Instruction Schools: Fundamentals of Art
Learn how Art Instruction Schools--a school for future illustrators--grounds its students in the fundamentals of art. Click through a series of illustrated lesson overviews on basic shapes, lines, tone and value, light source,...
TED Talks
Ted: Ted Ed: How False News Can Spread
In previous decades, most news with global reach came from several major newspapers and networks with the resources to gather information directly. The speed with which information spreads now, however, has created the ideal conditions...
Digital Public Library of America
Dpla: Women's Suffrage: Campaign for the Nineteenth Amendment
This set of primary sources uses photos, advertisements, maps, and other documents to shed light on that struggle toward the Nineteenth Amendment. Includes a teacher's guide.
History Tools
Recollection of the Delaware Prophecy (Of 1760s) 1808
An account of the Delaware Prophet, from 1808 by John M'Cullough. Although M'Cullough never met the Delaware Prophet, his secondhand account sheds some light on the mysterious figure said to have influenced the Pontiac War.
TED Talks
Ted: Ted Ed: Inside the Ant Colony
Ants have one of the most complex social organizations in the animal kingdom; they live in structured colonies that contain different types of members who perform specific roles. Deborah M. Gordon explains the way these incredible...
The Washington Post
Washington Post: Special Reports: Revisiting Watergate
A retrospective of the Watergate crisis, compiled from the resources of the newspaper largely responsible for first bringing the crimes of the Nixon administration to light. Includes a chronology, an analysis of key players, links to...
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