The speed of light in a vacuum is approximately 299,792,458 meters per second, which is equivalent to about 186,282 miles per second. In one year, there are approximately 31,536,000 seconds (assuming a non-leap year).
To calculate how far a photon of light can travel in one year, we can multiply the speed of light by the number of seconds in a year:
Distance = Speed of light × Time
Distance = 299,792,458 meters/second × 31,536,000 seconds
Calculating this, we find that a photon of light can travel approximately 9,461,000,000,000 kilometers (or about 5,878,000,000,000 miles) in one year. This distance is commonly referred to as one light-year and is often used to measure astronomical distances.