What is the speed of light measured in miles per hour?

The speed of light in a vacuum is a fundamental constant of nature, often denoted as "c." Its value is approximately 299,792 kilometers per second. When converted to miles per hour, this value becomes approximately 670,616,629 miles per hour. The closest value in the provided choices is 670,600,000 miles per hour.

This number represents a well-established figure in physics, noted for its significance in the theory of relativity and various scientific calculations. The accuracy of this speed is critical for understanding phenomena related to light and electromagnetic radiation. By rounding to a value that matches the options provided, we can see that 670,600,000 mph is the one that correctly aligns with established scientific knowledge about the speed of light.