What will humans do if faster than light travel can never be achieved?

Einstein's theory that it is possible to travel through space and time with the speed of light in three-dimensional space is inherently incorrect, and any spacecraft that exists as matter cannot fly beyond the speed of light if it wants to carry life. Humanity's transition from the solar system to other galaxies in the Milky Way is just a process of space exchange, from three-dimensional space to four-dimensional space, and then into three-dimensional space, changing star systems in the process of transformation. The four-dimensional space is inherently long, and it is a part of the cosmic body, and it is not artificially broken through a certain speed that the four-dimensional space can be naturally generated.

If so, where does this four-dimensional channel lead? Going to an aimless place? Therefore, the current theory of human beings for four-dimensional space and superluminal speed is wrong, four-dimensional space is not achieved by speed, even if there is no speed, it also exists naturally, and human beings are studying the spacecraft conversion mode between three-dimensional space and four-dimensional space, not to accelerate the spacecraft to 300,000 kilometers per second That's a fool's dream.

There are many directions for scientific development, and the current assumptions are not necessarily right, and perhaps humans can discover how to travel through wormholes so that there is no need for faster-than-light flight.

Human beings can only accept their fate, after all, there is no faster-than-light phenomenon in the universe.

Human beings may always live in a very small space, unable to see the vastness of the world and the mysteries of the universe.

That's a good question! Initially, two people took a lamp to the top of the opposite hill and sent a switch signal to measure the speed of light. Of course, it is not the speed of light that is measured, but the speed of human reactions.

With modern technology, it is not difficult to measure the speed of light. Take a laser beam and bounce it off a mirror a few kilometers away, with a time difference of tens of microseconds (millionths of a second). A light sensor receives a laser pulse and sends out an electrical signal, and today, even a good oscilloscope can reach the nanosecond (one thousandth of a microsecond) time difference, and such a time difference is not a problem.

Of course, the knowledge of precision measurement is deepened.

In the absence of modern technology, it is important to think of a clever way to measure the speed of light. Let me introduce you, you have to be patient: put a mirror a few kilometers away, and the one placed diagonally is a mirror that reflects half of the light and transmits half of the light, and the light will be reflected back by the mirror in the distance, and then the half lens will be reflected into the telescope to see a point of light.

Then put a gear on the optical path, close to the light bulb and the telescope, so that the light can pass through the gap between the gear teeth and see it in the telescope. Turn the gears up, and you can see the light flashing and flashing.

The light passes through the gears and is reflected back by the mirror, which takes tens of microseconds. When the gear rotates so fast that the light is reflected back, it may be blocked because the gear has been turned half a tooth away. At this point, the bright spot in the telescope disappears.

When the gear turns faster, it may also be because the gear has just turned past the angle of a tooth, and the bright spot appears again. The speed of light can be calculated by recording the speed of the gear when the bright spot first disappears.

This was in 1845, the first time humans could directly measure the speed of light. At that time, there were still many technical difficulties to overcome in order to do such experiments.

There are many people who measure the speed of light, and scientists are still constantly making accuracy, the earliest experiment of measuring the speed of light was done by Galileo, and the lights were lit on two hills, but the results were not measured, and later it went through the efforts of many generations of scientists.

In Maxwell's time, the Fisso gear experiment measured a more acceptable range, and Maxwell deduced the speed of electromagnetic waves through equations that the speed of electromagnetic waves is very close to the speed of light in the experiment, so it is asserted that the speed of light is an electromagnetic wave.

Later, the results of Michelson's rotating lens method were more accurate, and later generations continued to optimize the experiment on this basis and obtained good results. With the development of science and technology, and later the emergence of lasers, scientists invented the frequency-stabilized laser, which has greatly improved the accuracy of the speed of light measurement, so the current speed of light measurement is several decimal places to improve the accuracy.

In fact, the main reason why the beam of light was withdrawn by humans is that it has that kind of light in the process of running, and then it is displayed, so it is still very amazing to see this speed of this light.

It is mainly calculated by people through distance and time, which is why there is such a huge number.

It's very simple, from one place to one place to another place to receive light, the distance between the two points and the time of receiving the light, divide the distance by the time to get the speed.

By measuring the wavelength of a laser at a specific frequency, and then using the speed = wavelength * frequency, the speed can be calculated. The accuracy of this method is extremely high. Now, since the meter is defined from the speed of light, the value of the speed of light is also fixed, which is 299792458m s.

It is not measured, it is calculated, and the speed that can be obtained by calculating time and distance is a very simple mathematical formula.

Before I answer, I want to point out that in the current theory, it has never been said that time reverses the speed of light at or above it, which is a misconception of some people who don't know much about the relationship between time and speed.

--Time doesn't always move at the speed we feel we have now, it changes too. It's generally about speed. The faster the speed, the closer it is to the limit speed, the slower the time will ---

And then, what I want to tell you is that there are no two kinds of technical limitations, and theoretical limitations. To give you a very simple example, for example, the faster-than-light flight that you are asking about is that the current science and technology of mankind can't make a vehicle that can reach the speed of light, and that's the technical limit, but it's not possible to make a flight faster than the speed of light under the existing theory, and that's the theoretical limit.

Because in the existing theories, the theory of relativity is widely recognized, and the basic starting point of the special theory of relativity is that the speed of light does not change, which can be obtained by solving Maxwell's equations synchronously, and this is confirmed by the Michelson-Morey experiments!! The speed of light is the fastest in the current human observation range!!

The special theory of relativity (SR) requires that physical particles go back in time when they exceed the speed of light, and the law of cause and effect is broken!

By The Way, the core of SR is the innovation of the concept of time and space, and it is not a question of whether it can exceed the speed of light, so please don't question SR. (e.g., the problem of neutrinos the other day) sr has been confirmed in many experiments and theoretically, such as the spin of electrons; In the final analysis, physics emphasizes the law of cause and effect, and I hope we can read more foreign popular science books (be careful not to read what domestic people write) to improve our scientific literacy.

ps1: I recommend the first promotion series of books, because it is the handwriting of foreign masters (the serious attitude of Americans towards popular science is worth learning), Hunan Science and Technology Publishing House has introduced, Chinese translation.

PS2: I deeply feel that our scientific literacy is lower than that of Americans, and the key is that there is not enough publicity! Think deeply!

Because light is the limit of all speeds, unless you're sitting in an airplane made of photons. But even then, your body is not made of photons, and it still can't reach the speed of light.

The first is that there is no vehicle that can approach the speed of light, and secondly, the speed of light will turn back time, and the people of the future will return to the present day, and we will not see them, which means that it is impossible to fly faster than the speed of light in the future. (Personal opinion only).