The speed of light is a physical constant that represents the speed at which light travels in a vacuum. It is approximately 299,792,458 meters per second or 186,282 miles per second.
The speed of light is important because it is the fastest speed at which information can travel. It plays a crucial role in many scientific theories and is used in various technological applications.
According to current scientific understanding, nothing can travel faster than the speed of light. This is based on the theory of relativity proposed by Albert Einstein.
The speed of light is measured by using precise instruments and techniques such as interferometry and time-of-flight measurements. These methods involve measuring the time it takes for light to travel a known distance.
No, the speed of light has never been exceeded. Many experiments have been conducted to try and achieve faster-than-light travel, but all have failed to do so.