[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.

In this second installment of a three-part series on space-time, CERN scientists Andrew Pontzen and Tom Whyntie use a space-time diagram to analyze the sometimes confounding motion of light. [4:50]

A strobe light can illuminate an entire room in just tens of microseconds. Inexpensive strobe lights can flash up to 10 or 20 times per second. This project shows you how to use stroboscopic photography to analyze motion.

Einstein Light highlights the Theory of Special Relativity and related topics. Learn how Galileo, Maxwell, and Einstein contributed to our knowledge of relativity, electricity, magnetism, and time by watching fun, interactive modules.

This resource provides information about light and shadows. In addition, there is a short quiz that can be taken.

For thousands of years, navigators have looked to the sky for direction. Today, celestial navigation has simply switched from using natural objects to human-created satellites. A constellation of satellites, called the Global Positioning...

In a provided image, students try to identify what ordinary objects in the house can kick light into a lower gear. Find out why the speed of light isn't always 186,000 miles per second.

A historical approach to special relativity, giving all the events and names in the history of discovery of special relativity. Many links to these individuals.

This site provides a short explanation of light, how it travels, and the speed in which it travels. Many other concepts related to optics can be found on this site as well.

Learn about light properties through practice with formulas. This resource shows the relationship between the speed of light, its wavelength, and its frequency. A fairly simple, but important relationship.

This article helps explain the concept of electromagnetism as well as magnetic fields and the properties of the speed of light.

Discusses the validity of research showing that neutrinos travel faster than the speed of light.

Educator, Adam Savage, shares two astounding examples of profound scientific discoveries that came from simple, creative procedures: Eratosthenes' calculation of the Earth's circumference and Hippolyte Fizeau's measurement of the speed...

Meet Nobel Prize winner, Albert Michelson, an American physicist known for his work on the measurement of the speed of light and especially for the Michelson-Morley experiment.

Learners measure the angles of refraction of laser light traveling through gelatin, then plot their data to calculate the gelatin's index of refraction.

A triple eclipse crossing the face of Jupiter on 2 Feb 98. This set of five images captures the passage of the shadows of Io, Callisto, and Ganymede across the face of Jupiter.

What is electromagnetic radiation and how does it work? Review a captioned graphic that explains electromagnetic radiation and the visible and invisible types of radiation on the electromagnetic spectrum.

Kids learn about the speed of light and time dilation in regards to the theory of relativity in the science of physics. Also how gravity can change the passage of time.

[Free Registration/Login Required] Explore how water distorts the location of objects due to the speed at which light travels through different mediums by moving the red point to adjust the angle of the fisherman's line of vision.

[Free Registration/Login may be required to access all resource tools.] Refraction of light in matter and how light changes its speed and angle of refraction according to the type of medium it is travelling through.

Chem4Kids! provides an overview of the symbols representing numerical values in chemical equations. Each symbol is defined and described.

A lengthy biographical sketch from The New Advent of Jean-Bertand-Leon Foucault (1819-1868 CE) physicist and mechanician. Discusses his upbringing, scientific work, major accomplishments and published articles. Please note that "The...

This site examines the black hole as an object in astrophysics. Delve into this comprehensive resource that covers this concept from its history, to qualitative physics, the reality of black holes, mathematical physics and more.

[Free Registration/Login Required] Explore how Snell's Law arises out of the principle of least time; understand how light rays change direction at interfaces between materials using this interactive simulation. A PDF worksheet and a...