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Edit: Confused God
If you fly at the speed of light with a flashlight, then you guess that the speed of light emitted by the flashlight will be twice the speed of light, and today let's talk about the speed paradox of light. Always keep the same speed - 300,000 kilometers per second, why is that?
We all learned when we were in school, speed is relative, the ancients all knew, shouting with the wind, not pinch and hear, it can be seen that if you want to make it clear how fast a thing is, you must first find a reference, but light completely ignore this rule, to say an extreme example, if a flashlight it travels at the speed of light, then at this time you turn on the flashlight, please ask whether this light should it be the speed of light, or add a flashlight, its own speed becomes double the speed of light, the answer is, no matter what you stand on, even if you stand on a rocket, this beam of light can only be the speed of light, you have to ask why, then we must first figure out how the speed of light was discovered, and how to know this characteristic, the first person in history who was interested in the speed of light and officially proposed it was Aristotle, he said, according to my observations, light can not be described by speed, it is instantaneous, so this statement was used by posterity for 1500 years.
No way, even if someone can find that the sun revolves around the earth, even if someone can pry up the earth, but the speed of light you can't measure ah, by special relativity, for light, you are a static, a static, how to measure a motion, until Galileo said that he didn't believe that he couldn't measure this speed of light, he found two helpers, took two big red lanterns respectively, wrapped them in cloth, and said you stand on this mountain, he stands on this side of this mountain, you see his lantern lit, and immediately remove your cloth, Galileo himself stood in the middle of two hills, pinching the time difference, but a mile is too short for light, and light can circle the earth seven times a second.
Later he discovered a strange phenomenon, which he discovered through two years of observation and recording, Ganymede's orbital period is 1.77 days, but sometimes the time of Ganymede's appearance, always a few minutes late, after analysis he found that this time is the Earth and Ganymede, respectively on both sides of the sun, that is, when the observation distance is reached, every time this time Ganymede comes out of the time, always late the most, just like the moon should have come out at six o'clock today, but you found that it came out at 6.10 minutes, through this phenomenon, it combined with the orbit of this planet, and soon understood that this should be caused by the propagation speed of light, not that Ganymede really came out late, but I observed this distance lengthened, then the time I saw this image myself was actually delayed by a few minutes, so it was based on the estimated distance of the planet, the first time the speed of light was calculated to be about 200,000 kilometers per second, and then this algorithm attracted the attention of astronomer James Bradley, so James found a far, far away star, with a new method to calculate, the speed of light is about 300,000 kilometers per second, and the former calculated 200,000 kilometers per second is very different, later, more and more people want to calculate an accurate value. But the last one to accurately calculate the speed of light was not an experiment done to calculate the speed of light. In 1887, Michelson and Ma Li, inspired by the need for a medium for sound propagation, also wanted to prove that this light propagation must also need a medium, and this medium is called ether, and as a result, the two not only failed to prove that this ether exists, but also found that light does not need a medium at all. But in the process of proving the medium, they calculated that the speed of light was 299,910 kilometers per second, and then Maxwell calculated the speed of this electromagnetic wave in a purely mathematical way, which turned out to be the same as the speed of light, so he concluded that light should be an electromagnetic wave.
So Einstein on this basis, extended a lot of predictions of special relativity, until today, scientists are actually verifying its predictions, for example, mass can increase with the increase of speed, and the increased curve is also very interesting, before the speed reaches 90% of the speed of light, the mass will not increase too much, but once the speed enters 90% of the speed of light, the mass begins to increase exponentially, it is worth noting that many people today take this e equal to the square of MC, To explain that everything cannot exceed the speed of light, they say that when the speed on the right side of the equal sign is close to the speed of light, the mass becomes infinite, and the energy on the left becomes infinite.
How is this possible, even if Thanos snaps his fingers, it is also limited energy, how can the universe have infinite energy, so anything, nothing can have infinite mass, it is pushed backwards, no object can never exceed the speed of light, but in fact, when Einstein derived this formula, he first took the speed of light cannot exceed as a hypothetical condition, and then introduced this intelligent equation, so whether it can actually exceed the speed of light today is strictly an uncertain existence, For example, in the past two days, some people have proposed, you look at the starry sky at night, why is it dark, you think that since the universe is infinite, then we theoretically look at the sky from any angle, it should be full of stars, they think, those starlight that are too far away, it can not reach the vision of the earth, so human beings will never see those stars again, by the way, this also explains why aliens do not come to earth, because the distance of aliens from us is also expanding faster than the speed of light, If it comes, it can't go back, so people don't come.
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