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Speed of light  Wikipedia
https://en.wikipedia.org/wiki/Speed_of_light
The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics. Its exact value is defined as 299792458 metres per second (approximately 300000 km/s, or 186000 mi/s). It is exact because, by international agreement, a metre is defined as the length of the path travelled by light in vacuum during a time interval of 1⁄299792458 second. According t…
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All About the Speed of Light and What It Measures
https://www.thoughtco.com/speedoflight3072257
May 01, 2012 · What Is the Speed of Light? It is often stated that the speed of light is constant and that nothing can travel faster than the speed of light. This isn't entirely accurate. The value of 299,792,458 meters per second (186,282 miles per second) is the speed of light in a vacuum. However, light actually slows down as it passes through different media. Occupation: Professor of Physics And Astronomy
Occupation: Professor of Physics And Astronomy
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How "Fast" is the Speed of Light?
https://www.grc.nasa.gov/WWW/k12/Numbers/Math/Mathematical_Thinking/how_fast_is_the_speed.htm
Light travels at a constant, finite speed of 186,000 mi/sec. A traveler, moving at the speed of light, would circumnavigate the equator approximately 7.5 times in one second. By comparison, a traveler in a jet aircraft, moving at a ground speed of 500 mph, would cross the continental U.S. once in 4 hours.
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Speed of Light  What is Speed of Light?  Olympus LS
https://www.olympuslifescience.com/en/microscoperesource/primer/lightandcolor/speedoflight/
The speed of light, which is almost 300,000 km per second, can be manipulated by changing media or with quantum interference. Learn more with Olympus.
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How Fast Does Light Travel?  The Speed of Light  Space
https://www.space.com/15830lightspeed.html
Aug 18, 2021 · The speed of light in a vacuum is 186,282 miles per second (299,792 kilometers per second), and in theory nothing can travel faster than light.
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What Is the Speed of Light in Miles Per Hour?
https://www.thoughtco.com/speedoflightinmilesperhour609319
Jan 04, 2019 · The speed of light in a vacuum is 2.998 x 10 8 m/sec. What is this speed in miles per hour?
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speed of light  Definition, Equation, Constant, & Facts
https://www.britannica.com/science/speedoflight
The speed of light is considered a fundamental constant of nature. Its significance is far broader than its role in describing a property of electromagnetic waves. In a vacuum, the speed of light is 299,792,458 meters per second.
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