>>11563113Also, this is what seemed weird to 19th century physicists. The only thing that affected the speed was the rate at which those two fields fed into each other. To understand why this is weird, consider an example:
You are in a car. Your friend is in a car. You are going 20 mph; your friend is going 60mph. From your perspective (in a moving car), your friend is going 40mph. Now consider your friend's headlights. He turns them on. According to Maxwell's Equations (the equations used to derive how electromagnetic fields work), he sees them moving at the speed of light, and you see them moving at the speed of light. Note that you do not see them moving at the speed of light + 40 mph. That would make too much sense.
Instead, it turns out, the universe just fudges the rules of space and time to make the speed of light constant. Absolutely unfair.
