One-way speed of light

Light is a type of energy that moves in a straight line. The speed of light is always the same, no matter where you are or which direction it is traveling. It is called the "one-way" speed of light because if the light was traveling from point A to point B, it would always take the same amount of time for it to get there. We measure the one-way speed of light as 186,000 miles per second, which is really really really really really really really fast!