CK-12 Foundation
Ck 12: Physical Science: Wave Particle Theory
[Free Registration/Login may be required to access all resource tools.] The wave-particle theory and what a photon is, and evidence that electromagnetic radiation is both a particle and a wave.
Physics Classroom
The Physics Classroom: Propagation of Electromagnetic Waves
An explanation of and animation depicting the propagation of an electromagnetic wave through a material medium.
Florida State University
Florida State University: Basic Electromagnetic Wave Properties
This Florida State University page includes an interactive java tutorial that explores the relationship between frequency, wavelength, and energy, and enables the visitor to adjust the intensity of the radiation and to set the wave into...
University of Maryland
University of Maryland: Optics, Electromagnetic Waves
This site from the University of Maryland provides part of an anecdotal history of optics and the study of light. Extremely thorough treatment of how scientists came to believe in the wave nature of light, the idea of an electromagnetic...
University of Maryland
University of Maryland: Optics Highlights: Wave Optics
Part of an anecdotal history of optics and the study of light. Extremely thorough treatment of how scientists came to believe in the wave nature of light. Includes a short biographical sketch and discusses the work of Thomas Young...
Walter Fendt
Walter Fendt: Apps Zur Physik
This site, in German, offers numerous apps that illustrate common physics principles. Apps are organized into categories: mechanics, oscillations and waves, electrodynamics, optics, thermodynamics, the theory of relativity, physics of...
Science Struck
Science Struck: How Does Light Travel Through Space and Other Media?
A detailed discussion of the nature of light, how it can travel through a vacuum, and how the speed of light is affected when light travels through a medium.
Discovery Education
Discovery Education: The Em Spectrum: Waves of Energy
Students are introduced to the electromagnetic spectrum through this group research activity. Each group investigates a different wavelength range within the em spectrum and reports back to class. Discussion ideas also included.
CK-12 Foundation
Ck 12: Earth Science: Electromagnetic Energy in the Atmosphere
[Free Registration/Login may be required to access all resource tools.] Overview of electromagnetic radiation.
Nobel Media AB
The Nobel Prize: The Dual Nature of Light as Reflected in the Nobel Archives
This article discusses the historical figures who contributed to our understanding of the nature of light, x-rays, Quantum ElectroDynamic (QED) theory, and so on.
CK-12 Foundation
Ck 12: Physical Science: Properties of Electromagnetic Waves
[Free Registration/Login may be required to access all resource tools.] The speed of electromagnetic waves, their wavelengths and frequencies and how to calculate wavelength or wave frequency.
CK-12 Foundation
Ck 12: Physical Science: Electromagnetic Waves
[Free Registration/Login may be required to access all resource tools.] Provides the definition of an electromagnetic wave, electromagnetic radiation, and electric and magnetic fields. Also discusses how electromagnetic waves begin,...
CK-12 Foundation
Ck 12: Physical Science: Microwaves
[Free Registration/Login may be required to access all resource tools.] Microwaves and their uses, and how cell phones and radar work.
NASA
Electromagnetic Spectrum: Ultraviolet Waves
Ultraviolet (UV) light has shorter wavelengths than visible light. Though these waves are invisible to the human eye, some insects can see them. The specific wavelength values are given. Uses and applications of these waves are explained.
York University
York University: Color and Color Vision
York University provides an index page to several other pages on the topic of color and color vision. The pages are part of an online "book." Many graphics and explanations.
University of California
Center for Science Education: Gallery
A gallery of astronomy images which depict galaxies, comets, the moon, planets, nebulae, supernovae as seen in various regions of the electromagnetic spectrum. Each image in the gallery is described. Fascinating!
University of Colorado
University of Colorado: Physics 2000: X Rays
Here's a really simple demonstration of a fluoroscope. There are links to more information about the uses of X-rays as well.
Wikimedia
Wikipedia: James Clerk Maxwell
Examine the life and contributions of James Clerk Maxwell. This site also provides links to explanations of many of Maxwell's contributions in the field of physics.
Cornell University
Cornell University: Astronomy: Electromagnetism and Charge
This site from Cornell University provides a very short, very telling comparison of matter and charge. This is a good site to check out on the subject, with a chart diagram to help with further information.
University of California
Center Science Edu.: Electromagnetic Radiation on Trial
Here is a 1-5 day unit on electromagnetic radiation that features a teacher guide and student activities with extensions.
Synopsys
Synopsys: Optics: A Gentle Intro to Optical Design: Wave Particle Duality
Discusses the manner in which light behaves as both wave and particle. This dualistic nature of light is one topic of many on the page.