How do light waves travel?
Light travels as a wave. But unlike sound waves or water waves, it does not need any matter or material to carry its energy along. This means that light can travel through a vacuum—a completely airless space. It speeds through the vacuum of space at 186,400 miles (300,000 km) per second.
Why does light travel so fast?
A magnetic field cause the attraction between the North and South poles of a magnet. In light, the strength of these fields changes with time and place. Albert Einstein showed that light is the fundemental speed limit in the universe. Nothing with mass can move as fast as light.
How many kilometers does light travel in an hour?
The Speed of light is a constant. Light travels at about 300,000 km in one second. 1 hour has 60 minutes and one minute has 60 seconds, so light will travel about 60 * 60 * 300, 000 = 1080000000 km in an hour. 1 light hour = 675000000 miles .
What affects the speed of a light wave?
As far as I am aware, there are two things that effect the speed of light, and that is gravity and medium. Gravity can slow down light considerably, to the point where it doesn’t even move, i.e. a black hole. For the most part however, this effect is almost too small to measure.
Does light go on forever?
Light is a self-perpetuating electromagnetic wave; the strength of the wave can get weaker with the distance it travels, but as long as nothing absorbs it, it will keep on propagating forever.
Is it possible to travel faster than the speed of light?
If an object tries to travel 186,000 miles per second, its mass becomes infinite, and so does the energy required to move it. For this reason, no normal object can travel as fast or faster than the speed of light.