Hypothesis Cosmic time is decelerating, so does it mean that the time period for human existence is

No. The passage of time slows down, the amount of time that can pass does not change, and the time period of human existence will not be relatively extended.

Yes, if time stands still, then none of us will grow old.

I can give a very simple example of the theory of relativity. Suppose you are driving a high-speed train with a speed of 300 meters per second and the speed of light is 3000000000 meters per second, then let's imagine that you use a flashlight to emit a beam of light along the direction of movement on this high-speed railway, then the speed of this beam of light will be 300+3000000000 meters per second? The answer is no, because the speed of light in the universe is certain, so think about it, if the people on the ground and the people on the car emit a beam of light at the same time, these two beams of light travel 3000000000 meters relative to the ground, and the speed of the two beams of light is certain, so the time spent by the people in the car and the people on the ground in the distance of light is 1 second, then the 1 second on the car is not the same as the 1 second underground, and the 1 second on the car will be a little longer, Assuming that the speed of the high-speed train is 3000000000 meters per second, the people on the ground and the people on the car emit a beam of light along the direction of the car at the same time, and the light on the ground will be the same as the speed of the vehicle, and the light on the car will also move at this speed, which means that the light on the car will not leave the flashlight far away, because he cannot let the speed of light exceed 3000000000, that is to say, the time of the people on the car has been stationary, and the metabolism of the person will also be stationary.

Because it's not just light, you can't have any movement under these conditions, including the cells and molecules that make up your body, because any movement will cause you to speed faster than the speed of light, and no speed is allowed in the universe to be faster than the speed of light.

Hehe, the landlord is as interested in the theory of relativity as I am, so I'll solve your doubts in more detail.

There is also a length contraction in the theory of relativity, [that is, when you fly at high speed relative to the ground (the speed is close to C), you will think that the distance measured on the ground 8c becomes 2C or less (for example, it must be), so the time it takes your spacecraft to fly this distance (2C) is shorter than the time to fly over 8C] This brings out the time contraction effect. What is in parentheses is what people on the ground think or measure.

Although it is impossible to accelerate your spacecraft to C according to the theory of relativity (it is not enough to use up all the energy on Earth to accelerate a 1-gram object to C, and it will take infinite energy), I believe that future theories will overturn this conclusion.

Now talk about what happens when you reach the speed of light, when you reach the speed of light relative to me, you think that my world becomes a piece of paper without thickness, and of course I'm not talking about it rigorously.

Hope it helps the landlord! ，

The prevailing view is that the speed of light cannot be reached. The matter that makes up light is just a mass of energy.

So, assuming that the spacecraft reaches the speed of light c, the distance of 8c is just a measurement when the spacecraft is stationary. When the spacecraft reaches C speed, the effect of speed on time becomes absolute, that is, any distance is as close as a piece of paper, that is, time stands still on the spacecraft. But the earth was still past 8

Your understanding of the theory of relativity is still quite vague.

First, it can't reach the speed of light.

Second, according to your original intention, when the spacecraft is flying at near the speed of light, the length observed by different reference frames is different, that is, the shrinkage effect. The distance on the ground is 8, and the distance on the ship is a line segment in motion, shortened to - e.g. 5. The same process will appear to an observer on the ground to take a long time.

That is, observers on the ground think that time has slowed down on the ship.

Currently, the fastest speed known to mankind in the universe is the speed of light, which is 3 10 8 m s in size

So the answer is: light

The following statement about the speed of the universe is missing, and the wrong one is ()aEscape velocity refers to the minimum velocity at which an artificial celestial body can escape the gravitational pull of the Earth at a certain height of the Earth.

b.The detachment velocity is also known as the second cosmic velocity.

c.The first cosmic velocity at different altitudes on Earth does not want to be the same.

d.In order to get the cosmic speed, the most basic thrust comes from the rocket.

Correct Answer: a

Compared to the universe, the earth is only a material component of the universe, and its speed of motion is negligible, almost stationary.

Almost zero. Because the universe is so large and infinite, the speed of the earth's movement is almost zero relative to cosmic space.

The Earth rotates on its axis at all times, reaching a linear speed of 1,700 km/h at its equator. 1700 km h! This speed is quite fast for us human aircraft, but not very fast at the cosmic level.

If we convert hours to seconds, the Earth's rotation speed becomes kilometers per second.

1 All Established! Key point: The observer's perspective is different.

For an observer outside the event space, the two spatial temporal velocity rates are different;

For objects, i.e., the observer in the event space, the observer in space 1 travels the same time as the observer in space 2.

A simple example is that Space 1 lives to be 80 years old and ends its life. He does not live in space 1 but in space 2 and still lives to be 80 years old, at the end of his life, so the sum of the time experienced by the object is equal to that.

People who observe two spaces outside of space 2 are like playing a movie at two TVs at a normal speed, and the same movie at a fast forward or slow forward, so they feel that the speed of time is different.

And so on, the same is true for n spaces with n flow velocities.

Not equal because the object is in motion and in the process of destruction.

The answer to Stacross is good, it holds.