The speed of light in a vacuum is approximately 299,792,458 meters per second (about 300,000 kilometers per second or 186,282 miles per second). This value is considered a fundamental constant of nature.
The speed of light in a vacuum is approximately 299,792,458 meters per second (about 300,000 kilometers per second or 186,282 miles per second). This value is considered a fundamental constant of nature.