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Bookmark or Share- Physics Explained: Here's Why The Speed of Light Is The ... - ScienceAlertThe speed of light in a vacuum is 299,792,458 metres per second, a figure scientists finally agreed on in 1975 – but why settle on that figure? And why does it matter? Answering those questions takes us on an amazing journey through space, time, physics...
- Speed of light - WikipediaThe speed of light in vacuum, commonly denoted c, is a universal physical constant that is exactly equal to 299,792,458 metres per second (approximately 300,000 kilometres per second; 186,000 miles per second; 671 million miles per hour).
- Speed of light - WikiwandThe speed of light in vacuum, commonly denoted c, is a universal physical constant that is exactly equal to 299,792,458 metres per second. According to the special theory of relativity, c is the upper limit for the speed at which conventional matter or energy can travel through space.
- What is the speed of light? | Live ScienceNothing can travel faster than light — not even our best spacecraft — according to the laws of physics. So, what is the speed of light? Light moves at an incredible 186,000 miles per second...
- How fast does light travel? | The speed of light | SpaceThe 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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