Why is light time, and how light determines time?

First of all, you need to understand the principle of the invariance of the speed of light, since the speed of light is the limit of the universe, in order to ensure that light is 300,000 km s relative to anyone, the time of the person moving must slow down. How can it be slowed down? It is important to understand that time is not a rigid, mechanical clock, it is the existence and manifestation of motion, an integral part of concrete things.

Electrons move around the nucleus at close to the speed of light, and it is the rate of electron motion that determines the time scale of our world. When atoms move at a speed close to the speed of light, the movement of electrons slows down, that is, slows down. This is a redshift effect, which is equivalent to a slowdown in time.

In the theory of relativity, there is an important data, which is equal to v c, which is the ratio of speed to the speed of light. When the velocity is high, the passage of time of the object is t=t1 (1- 2), and it can be seen that when the velocity is close to or even reaches the speed of light, it is close to or even equal to 1, so that the root sign is 0 and the passage of time stops. But if the speed of light is exceeded, there will be a negative number under the root sign, which is equal to a time regression.

So the theory of relativity holds that no object can move faster than the speed of light.

I don't understand the landlord's addition, what substantive changes? Has the landlord experienced faster-than-light?

The theory of relativity doesn't say that. It has not been said that light is time, nor has it been said that light determines time. The theory of relativity does not even say that it is possible to go back in time beyond the speed of light, on the contrary, the theory of relativity points out in an extremely affirmative tone: it is impossible to exceed the speed of light!

Go to the physics department of any university, talk to any physics professor about faster-than-light, and see how people react. I can tell you for sure that they will react in the same way as someone talks to them about perpetual motion machines.

I don't know if the landlord has these questions from the **, if you are interested, I suggest you really study some university physics, especially electrodynamics. It's very clear there!

To put it bluntly, it is to achieve superluminal speed beyond the speed of light and go back to the past through superluminal speed. (I think it's a bit unrealistic).

So when your speed is greater than the speed of light, going back in time should be just an image of the past, and it can't change the fact that the past exists, right?

Time is absolutely fluid and relatively static.

Light does not move absolutely, because light is a photon beam, a type of radiation, and its motion in the vicinity of a high-density object is also affected by gravity.

The so-called black hole is because the density is too large, and the speed of light within the gravitational influence of the black hole is reduced to lower than the escape speed of the black hole, so the black hole does not emit light, just like you can't jump 10 meters above the ground, and the light can't fly out of the black hole.

To talk about relationships. The premise is that in our lives, the flow of the two cannot be changed. The speed of light in a vacuum is 300,000 kilometers per second, which can be understood as the light only takes more than eight minutes to travel from the sun to the earth. In most cases, we can think of the flow of light and the flow of time as the same thing.

The relationship between light and time:

When approaching the speed of light, you can travel through time and space, which is the focus of special relativity. Time has nothing to do with light, it can only be said that light is a medium, time is also a medium in a sense, and a light year is a unit of distance that measures light and time. The speed of light cannot be reached within the force of nature, that is to say, no object can exceed the speed of light under normal circumstances, in other words, if you reach the speed of light, you are beyond the normal range, theoretically it can be beyond the range of time measurement, so it can be space-time, simply put, it is so, but this is a conjecture after all, and it has not been confirmed.

Light has nothing to do with time itself, light is a substance, and time is just a unit of multidimensional space. The two are not to be equated. Although there is light in a light year, a light year is only a unit of the universe, which is calculated by how long the light travels.

Time, in a broad sense, exists as a unit in multidimensional space. Hours, minutes, seconds, milliseconds, subtlety, etc., are all units of time.

We have said that it is endless to fight with the sky, the earth, and nature, but we never dare to say that we are fighting with time. We can only say that we race against time, some people are afraid that time is not enough, some people waste time in vain, do not cherish the preciousness of time, people's life is very short, to live a worthwhile, meaningful, dedicated, love, you have to know what time is. What is Time?

What is time.

If anyone mentions this, we can't help but look down at the tick-tock watch. What about before there was no watch? People will look up at the sun, moon and stars, so what is time itself?。。

We feel that time is specific and can be grasped, because we see the cold coming and going, the flowers blooming and setting, the sunrise and sunset, the morning and dusk recruitment;

If you look at the history of science in various countries, you will find a common pattern: astronomy and the calendar were almost always the first to develop. Because for human beings to survive and develop, they need to work and rest.

When is the right time to work and what is the right time to rest? Sleeping day and night is the most ideal thing. And it's easier for people to grasp the division between day and night.

The Earth rotates regularly for 24 hours. The first concept of time in human beings is day and night. Therefore, people regard time as "time".

An inch of time is an inch of gold, and it is difficult to buy an inch of time." What is time. "Light" is both bright day and night, and "yin" is both dark and dark; The harmony of "light" and "yin" is day and night, and has become a synonym for time.

Time does not wait for others, and it is difficult to return to the prime of life. "Ruthlessness is the snow in the temples, and it climbs on the head of the jade man auspiciously."

The shadow behind the light on the object --- the shadow -- with the change in the direction of the sun's rays The shadow --- to the literati to say 94 time...

Time flies quickly, just like the light!

This question is actually quite understandable. Let's not dwell on whether light years can represent time. Let's talk about how to use light to represent time correctly.

First of all, the light-year is a unit of distance by definition, so let's simplify it. One light year is the distance generated by light walking for a year, so we use "one incense" to represent the distance of one minute of burning incense. Do you usually use "one incense" to represent time?

Obviously, this is not going to happen, we usually say one stick of incense, two-thirds of the sticks of incense. Actually, here a stick of incense is an abbreviation, and the full name should be "a 15cm stick of incense burns at a rate of 3cm per minute, and the time it takes to burn it". So by analogy we can say something like:

The time it takes to walk a light-year at the speed of light. Then, in short, from the structural analogy, it can be "one light year", but the two lights here can be canceled out, then the actual result is one year. It may sound like a bit of a mouthful, but if you change the length unit, it's still a very practical question.

We can say that one light meter, one light kilometer, and one light 10,000 kilometers can all represent time. I didn't look up the literature, but I remember that there was a saying that one light meter is used to represent a unit of time.

Next we can get into a more interesting concept. In fact, velocity (specifically the speed of light), time, and length in a stable four-dimensional space are very stable triangular structures, and any two units can define a third unit. Therefore, the light year is actually a combination of speed and time, and he can only express distance.

All of the above is discussed in the context of a stable macro environment.