The [speed of light](https://en.wikipedia.org/wiki/Speed_of_light) in a vacuum is approximately 299,792,458 meters per second, which is commonly rounded to 300,000 kilometers per second (km/s) or about 186,282 miles per second (mi/s). This value is denoted by the symbol "c" and is a fundamental constant in physics. It plays a crucial role in various scientific theories, including Einstein's theory of relativity, and it represents the maximum speed at which information or energy can be transmitted in the universe.
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