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I wonder if Einstein said that we can't go faster than the speed of light, then why did he say that we can go through time and space when we go faster than the speed of light? Does Einstein want to say that it is impossible for us to travel through time and space? Since he thinks that it is impossible for us to travel through time and space, why should he say that we can travel through time and space beyond the speed of light? What does he think about traveling through time and space? P. S. even is additive P. S. I'm additive. I have no idea about relativity. Please don't post special relativity and general relativity here. It's too abstruse for me to digest
Let's first answer why we say that we can travel through time and space if we exceed the speed of light
If you look at the earth on a planet 1000 light-years away (light-years is the length unit of light propagation in one year), then the earth should be shining like a star
In fact, the earth is broadcasting images all the time
So if we look at the earth with a super high-power telescope on a planet 1000 light-years away
What we will see is the image of the Earth 1000 years ago. In other words, we can see what happened on the Earth 1000 years ago
If we can reach a planet 1000 light-years away in a very short time, we can see what happened 1000 years ago, which is called time travel
Of course, we can only see the past, not change it
And why can't we travel through time
Einstein said that the way to travel through time and space is to make it faster than the speed of light
It's a terrible energy! We can't bear it
These are what my teacher said in class a few years ago
I'm sorry for my poor language skills
RELATED INFORMATIONS
- 1. Is superluminal going back to the past or to the future? Why? Don't copy!
- 2. [superluminal speed] what happens if a person walks on a train moving at the speed of light? I mean, listen to me: Let's say I'm standing on a railway that faces east and West. I'm an observer, I'm carrying a camera, and I'm fixed to a point on the railway. Then I see a train moving at the speed of light in front of me coming towards me (if I can take a picture of it, but it can't hit me). At the same time, there are two passengers on the train, a passenger a, One passenger is B. passenger a has been sleeping in the sleeper compartment of the train, and he and the train are relatively static. The other passenger B wants to go to the toilet in front to pee. When passenger B stands up and walks in the positive direction (that is, the direction of the train) at a constant speed "V", look at the train in front of me and passengers a and B on the train, What will I see? (I give the following three answers, I don't know if they are correct.) 1. The speed of a train is the speed of light, 2. The speed of passenger a sleeping in the sleeping car is also the speed of light, 3. The speed of passenger B walking to the toilet is the speed of light + V, faster than the speed of light? (this may not be right, because according to Einstein's special theory of relativity, the speed of light cannot be surpassed.) So the key question is: If the train can't go to the toilet, how can he still see if he can't go to the toilet at the speed of 50 meters I don't agree with "speed of light + V can still be regarded as the speed of light" answered by "likeren 2010" on the first floor, because the speed of light is not to be surpassed. For any object, the speed of light can only be lower than the speed of light in vacuum. It is impossible to surpass it, even if it is only 10-100 million cubic meters / second, let alone surpass the speed "V". Therefore, the answer on the first floor is groundless As for the answer of "let others not hurt" on the second floor, I think you misunderstood me. The car has been broken down, and what's wrong with this assumption? You're here to make trouble. Identification is over
- 3. Why does superluminal travel through time?
- 4. If you fly faster than light, can you see the past?
- 5. Superluminal can go to the future and see the past. Is it back to the past or in the future? Go to the future and see what happened in the past. Is it in the future or in the past? My little brother is so stupid that I feel dizzy. Is my logic wrong? (don't copy it. It's better to be more popular.)
- 6. The speed of light is 300000 kilometers per second. How many kilometers are there in a light year?
- 7. How long does it take for the light from the sun to reach the earth? Why are all the planets in the solar system on the same plane? What are the processes of the lunar eclipse? What are the reasons for the formation of meteor shower? Which planet in the solar system is the largest? Which one is the smallest? Which one is hotter, Venus or mercury, Why is the solar system unique? What other galaxies are there? Why is Neptune blue!
- 8. It takes about 7.5 minutes for the light from the sun to reach the earth (1) What is the distance between the sun and the earth? (2) If a car with a top speed of 350km / h keeps running, at least how long does it take for it to finish the journey? It's 7.6 minutes
- 9. Does the distance between the sun and the earth change at different times?
- 10. When the sun is closest to the earth, what season is China in?
- 11. How to deduce that the speed of an object cannot reach the speed of light from Lorentz transformation Can it be deduced from the basic principles of relativity?
- 12. Derivation process of solving Maxwell equations
- 13. Can Maxwell's equations deduce the principle of invariable speed of light? In Baidu Encyclopedia, it is said that the principle of invariable speed of light is obtained by solving Maxwell's equations. Is that right? If so, why did scientists at that time think that there was ether and that the speed of light was variable
- 14. Formula expression of measuring light speed by rotating prism method Suppose that the distance between the two peaks is l, the rotation of the eight prisms is t, and the rotation time is one circle, then the formula of the speed of light is v = 16L / T? (the answer must know what he measured.)
- 15. One second =? Light year =? Astronomical unit =? Kilometer =? Meter =? Centimeter must be accurate!
- 16. Draw the relationship between the sun, the earth and the moon during the solar and lunar eclipses
- 17. Position diagram of sun, earth and moon during solar eclipse Cockscomb project
- 18. What is the relationship between the sun, the earth and the moon?
- 19. The relationship between the earth, the moon and the sun, how they work, how time is counted,
- 20. Is it because the earth is too far away from the sun that the four seasons of the earth and the phases of the moon change? If you have any questions, please give me your advice 1. The volume of the sun is 1300000 times that of the earth. Can I think that: If the sun is at zero distance from the earth (if it doesn't vaporize the earth), will there be no day and night change, no four seasons change, and no moon full or clear? Because the sun can shine on almost every corner of the earth and the moon all the year round, that is, all the surface of the earth and the moon is in the extreme day all the year round Now, the reason why the four seasons change is that the sun is so far away from the earth that it almost turns into a parallel light and has no angle Is that right? 2. There is another problem Suppose that there is only one sun and one earth in the vast universe, then we adjust the distance between them from zero to infinity, will there be such a change: the earth is full bright at first, and then the dark part gradually increases until it is completely dark? Is this assumption correct?