The statement "Light travels at 300,000 km/sec" refers to the speed of light. In physics, speed refers to the magnitude of the velocity of an object, while velocity includes both the speed and the direction of motion. Since the statement only mentions the numerical value of 300,000 km/sec without specifying any direction, it describes the speed of light. The speed of light in a vacuum is approximately 299,792 kilometers per second (or about 186,282 miles per second).