because
1. A quiet person's time is normal time. He measured that the speed of light leaving you was10000 km/s.
Your speed is close to the speed of light, so people who are relatively still will have a slower time. For a still person, your second is equivalent to 30 seconds. Light travels faster than you10000 km/s. In one second, you think that someone else has passed 30 seconds, then your measured speed is (30 seconds for a still person) * 10000km/ (yours 1 s), and the measured result is still 300000 km/s.
Similarly, if you are closer to the speed of light, your time will become slower, so you think that the speed of light is 300 thousand km/s, even if you reach the speed of light, the light is faster than you, not static. Because light is still moving, it means that you can't exceed the speed of light, so Einstein said that the speed of light can't be surpassed.
It's time, right? So by the way, if you really reach the speed of light. It's not just a little slow. Then your time stopped. The speed of light you are chasing is really zero in your measuring instrument. Although your time has stopped, the time of the still has passed in an instant. If you are only a little slower than the speed of light, when you stop, you will find that although you are only a few seconds older, the still person has been dead for millions of years.
And if you really equal the speed of light, you will never stop the horse, because you are always there. Even if you stop, the time in this world has run out (words can't convey meaning, only Einstein can say, you can never exceed the speed of light).
Some people may say that light travels at the speed of light. As a photon, will time stop? I don't think light is the speed limit, but the speed of light is infinitely close to this limit, but it is always a little slower than him.
So some people fantasize that time will stop when it reaches the speed of light, and it will be diverted when it exceeds the speed of light. . . .
So I thought of two interesting examples.
This time, two people at the same time driving a high-speed spacecraft chasing the unified speed of light. The speed of A is 290,000 km/s, and the speed of B is 280,000 km/s. Both of them see that the light is moving at the speed of light.
That vest passed 1 second, and b passed 2 seconds. The still man passed 30 seconds. So they measured the speed of light at 300,000 km/s.
How much faster does B test A than himself? I calculated 150000 km/s, (hehe, maybe I miscalculated, and my math score was the worst, and I have no idea. )
Although some people think that A is only faster than B10000 km/s.
If B accelerates to 290,000 km/s, then this time, the two spacecraft are relatively stationary. A and B keep the same speed of time passing. If B accelerates to near the speed of light again, the vest will see that B's speed will increase from 0 to 300,000 /km/s, while B thinks it will only increase from 29 to 30.
Here comes the interesting thing. The next day, A and B are driving the spaceship to drive the light. This time, they are in the opposite direction, chasing each other's light at a speed of 290,000 km/s at a distance far enough. When they passed by, A looked back from his spaceship and saw B's spaceship. Its flying speed was 580,000 km/s (this place is wrong, as explained below). Did Ma B double the speed of light? No, because people at rest saw two spaceships flying at a speed of 290,000 kilometers per second. This is the same as seeing a spaceship. I don't think there is any problem with the speed of each spacecraft in A and B being sub-light speed.
The question is, did A see B's spaceship fly away at a speed of 580,000 km/s? I don't think so, but the stationary person detected that the two spaceships left at a speed of 580,000 kilometers per second, but for A and B, they did not exceed the speed of light. A sees that the speed of spacecraft B is not the relative speed of 580,000 km/s measured by a stationary person, but the time difference between them at this speed, which should be 583,000 km/s. The closer the spacecraft is to the speed of light, the closer it is to infinity! ! ! ! Because the speed is changed every time, a small speed difference will make a big difference, and this process is not linear. Maybe there is a function that can be calculated. I am not a mathematician, so I can't simply calculate this function, but I believe some senior scientists may have calculated this function.