Where does light travel to and where does it stop?

Light travels through space in a straight line at a constant speed of 299,792 kilometers per second (or approximately 186,282 miles per second). Light does not stop in space; it can travel infinitely until it is absorbed by a material or object. However, when light enters a medium, such as air or water, its speed changes, and it may bend, scatter or reflect.

The speed of light is the ultimate speed limit in the universe, according to Einstein's theory of relativity. This means that nothing can travel faster than the speed of light. However, there are regions in the universe where light cannot reach, such as the event horizon of a black hole. Beyond this point, the gravitational pull of the black hole is so strong that not even light can escape.