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speed of light
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Introduction References & Edit History Quick Facts & Related Topics
Images & Videos
relativistic velocity combination
invariance of the speed of light length contraction and time dilation Figure 6: Fizeau's method for measuring the velocity of light. Figure 7: Michelson's Mount Wilson experiment, 1927.
Understand refraction and why the speed of light changes when it travels through glass
relativistic mass
What would traveling at light speed really look like?
See how to break the “cosmic speed limit” of light by using a laser
Quizzes
Italian physicist Guglielmo Marconi at work in the wireless room of his yacht Electra, c. 1920.
All About Physics Quiz
Read Next
July, 2006, Launch of Space Shuttle Discovery STS-121. See attached for full caption information.
Will Light-Speed Space Travel Ever Be Possible?
Highway Night Traffic Portland, drive, driving, car, automobile.
What's the Difference Between Speed and Velocity?
Galaxy clusters like Abell 2744 can act as a natural cosmic lens, magnifying light from more distant, background objects through gravity. NASA's James Webb Space Telescope may be able to detect light from the first stars in the universe if they are gravitationally lensed by such clusters. (astronomy, space exploration, galaxies)
How Fast Is the Universe Expanding?
Albert Einstein.
Celebrating the Birth of a Genius
Planet Jupiter with its moon Io at left, photographed by the Cassini orbiter during the Cassini-Huygens mission, 2000. spacecraft
7 Important Dates in Jupiter History
Discover
Close-up of ostriches (Struthio camelus) necks and heads; location unknown.
6 of the World's Most Dangerous Birds
Stylish light blue jeans on wooden background, closeup of inset pocket
Why Do Jeans Have That Tiny Pocket?
Coriander leaves, fresh green cilantro on wooden background, herbs
Why Does Cilantro Taste Like Soap to Some People?
Nativity Scene, Adoration of the Magi, Church of the Birth of the Virgin Mary, Montenegro
Why Is Christmas in December?
Srinivasa Ramanujan, Indian mathematician and autodidact.
6 Interesting Facts about Srinivasa Ramanujan
Watergate scandal. Richard M. Nixon. President Nixon gives a press conference and talks to the press, March 12, 1971.
9 American Political Scandals
Colorful winter sunset
What's the Difference Between a Solstice and an Equinox?

speed of light: References & Edit History

Article History

Type Description Contributor Date
Add new Web site: University of Nebraska Omaha - Calculating the Speed of Light. Dec 21, 2024
Add new Web site: New York University - Department of Physics - Measuring the speed of light. Oct 29, 2024
Add new Web site: Physics LibreTexts - Is 'c' the Speed of Light? Jun 18, 2024
Add new Web site: The University of Knoxville - Department of Physics and Astronomy - Measuring the Speed of Light. Jan 03, 2024
Add new Web site: Academia - Analyzing "Constancy of the Speed of Light". Nov 17, 2023
Add new Web site: Live Science - Why The Speed of Light Matters. Jun 30, 2023
Add new Web site: Florida State University - Molecular Expressions - Speed of Light in Transparent Materials. May 15, 2023
Add new Web site: University of California - Department of Mathematics - How is the speed of light measured? Apr 03, 2023
Add new Web site: Space.com - What is the speed of light? Aug 26, 2022
Removed media. Aug 17, 2021
Media added. May 28, 2021
Video added. Apr 27, 2017
Add new Web site: The Museum of UnNatural Mystery - The Speed of Light. Apr 22, 2016
Added video. May 12, 2015
New article added. Feb 03, 2009
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