The question of faster than light. The speed of light is faster than the speed of light.

Very well conceived. However, the theory is not correct. Approaching the speed of light, the mass increases and time slows down. When the speed of light is reached, static mass matter becomes infinitely heavier, time stands still, and speed does not matter.

Other. One of the two basic assumptions of Einstein's theory of relativity is the assumption that the speed of light is the maximum speed of the universe. But in the early days of the universe, there was a superluminal speed, and I can't really say anything about that.

Support you to continue**, Galileo's Leaning Tower experiment also discovered the logical contradiction of the original theory. Maybe you will be able to discover the logical contradictions of the current theories and open a new page in physics.

You don't have to go to such trouble, you just say throw something forward on a spaceship traveling at the speed of light, or shoot a bullet or shoot a laser. You ask this question because you always feel that speed is additive and influenced by life experience. The theory of relativity first shows that the Galilean velocity transformation is not valid, the speeds are not additive, and according to the Lorentz transformation, even if the laser is fired forward on the light-speed spacecraft, the speed of the laser seen from the outside is the speed of light, not the speed of light.

It depends on whose speed a and b are relative to, and if both are relative to you, then there is no superluminal speed. If the velocity of b is 20 wkm s relative to the spacecraft, then the Lorentz transform, and the result is still not faster than the speed of light.

When the speed of an object approaches the speed of light relative to another object, the time of one object slows down relative to another, and the time change conforms to the Lorentz transform.

In the 70s of the 20th century, it was confirmed that the difference in the position of the solar eclipse at the same time was observed by satellites and ground observatories) The speed of light is the maximum speed known at present, and the kinetic energy of the object is infinite when it reaches the speed of light, so it is impossible to reach the speed of light according to the current human cognition, so the problem of the speed of light and the speed of light is not within the scope of physics discussion.

Faster-than-light is impossible.

From the current point of view of physics, superluminal speed is impossible, because one of the two basic assumptions of the theory of relativity is that the law of cause and effect is true, that is, if we admit the law of cause and effect, then superluminal speed is impossible under the framework of the theory of relativity.

We know that the Lorentz transform is a hyperbolic transformation in Min's space, so there will be two asymptotic lines, the part between the two asymptotic lines close to the space axis x is called space-like space, and the part near the timeline t is called time-like space, and only in time-like space can only satisfy the law of cause and effect (that is, our current world).

There is no superluminal speed in the universe, the speed of light is the limit. How do you know? One bullet goes east, one bullet goes west, and the relative velocity of the two bullets is v1+v2

One beam of light shines first to the east and one beam of light shines to the west, and the relative velocity of the two beams of light is 2C?No, it turns out to be a speed of light c. This is the theory of the speed of light limit.

There is no such thing as pure theoretical reasoning! The theory of relativity gives us the perfect explanation - the speed of any object can only be infinitely close to the speed of light, but it can never be surpassed! However, this is only the mainstream view of physics now.

There are also some non-mainstream schools of physics that believe that there may be. Moreover, such observations have indeed been made in astronomy. Some quasars expand several times faster than light!

It is thought that there is a significant overdistance effect in the measurement of two separated particles in the entangled state. Ebhard proved that it is impossible to use this effect to transmit any information, so faster-than-light communication does not exist. But there is still controversy about the EPR paradox.

Virtual particles: In quantum field theory, force is transmitted through virtual particles. Due to Heisenberg's uncertainty, these virtual particles can travel faster than light, but virtual particles are only mathematical symbols, and faster-than-light travel or communication still does not exist. Quantum Tunneling Quantum tunneling is the effect of a particle escaping a barrier above its own energy, which is not possible in classical physics.

Calculate the time it takes for a particle to travel through the tunnel, and you'll see that the particle is traveling faster than the speed of light.

The expansion rate of the universe is faster than light, and it is faster than the speed of light. Therefore, it is not impossible to exceed the speed of light, and it is said that there is also a possibility of a light explosion.

The fact that the speed of light does not exist in the current human understanding, and the fact that we cannot capture relevant evidence for the time being does not mean that we will never find it, just as experts say that light cannot escape the gravitational pull of a black hole

The human brain is faster than light. Think as far as you want. How fast to be is multiple blocks. Imaginative and infinite...

If a clock were to travel at twice the speed of sound from its origin, what would we hear?

One second, it is 1 second away from the origin of the sound second, but we hear this event at the origin, it takes another second, so we find that in the local clock seconds, the distant clock is 1 second, the local clock is 3 seconds, and the distant clock is 2 seconds, that is, when we ignore the signal transmission time, we mistakenly think that the distant clock is slow. And the faster it is, the slower the bell becomes.

Suppose there is a ruler with a length of 1 sound second, and we have an infinitely long ruler fixed on the ground, and there is a detection device at the head and tail of the moving ruler, when it is detected to coincide with a certain ruler scale on the ground, the scale is reported by sound, and we receive the sound at the origin of the ground ruler. When the ruler tail reports 0 seconds, the ruler head is already 1 second away from us, and this distance will not be received until 1 second later; When the end of the ruler is 1 sound second distance, the ruler head is 2 sound seconds, or we receive the ruler tail 1 second after 1 second, we can receive the ruler head report 2 seconds, so we will intuitively think that the ruler tail first to the scale, the ruler head after reaching the scale that it should have reached immediately, it feels like the ruler is far away, shortened. And the faster you move, the shorter it feels.

Theoretically, we will catch up with the sound that the bell made before, that is, we will first hear the bell strike 3 times, report 3 o'clock, then hear the bell strike 2 times, report 2 o'clock, and then hear the bell strike 1 time, report 1 o'clock, this is the phenomenon of time reversal beyond the speed of sound!

The phenomenon of slow clock, ruler shrinkage, and superluminal time reversal can all be achieved by sound experiments, which does not violate any classical theory, but only supplements the problems that Galileo, Newton and others have never considered, proving that Einstein's theory of relativity is indeed to solve the problem of what phenomena will be seen when moving close to the speed of light, and he ignores the problem of measuring speed and treats the phenomenon as the essence of physics. According to the method of this article, the theory of relativity does not exist, and neither the paradox of the twin sons nor the paradox of killing the father when the son returns to the unborn does not exist.

It is impossible to exceed the speed of light, because photons are the lightest particles, and only light can move at the speed of light, and if an object with a mass greater than a photon is only possible if it has infinite energy.

First of all: there is no going back to the past.

The theory of relativity that exceeding the speed of light can slow down time and come to the future does not mean that matter itself has come to the future, but that matter perceives things from the past. For example, you are traveling faster than the speed of light to the outside of the Earth.

After a year of walking, you stop, look back at the earth, and see what the earth saw a year ago. It feels as if you have stepped back in time, but you are now in the future at the moment when you saw the sight happen.

Therefore, to go back to the past or the future is just a relative feeling on your part, and you cannot go back to the past or the future.

All objects emit light, and above the speed of light you will see the previous light, it's as simple as that.

According to the mathematical formula, it is indeed back to the past, and I don't know this kind of problem.

I also found a passage that doesn't match your question, but it's a little useful.

Scientists have found that when the spacecraft passes through the gravitational field, the pull of the gravitational field is converted into thrust, and the spacecraft can fly at the speed of light or even faster than the speed of light during that time. NASA experts have created the "space-time field resonance theory", which is based on the "unified field theory" of Albert Einstein and German physicist Heisenberg.

The gist of it is to use the elasticity of electromagnetism, gravity, the speed of light, and space-time to evolve together, to instantly cross interstellar space. At that point, going back in time will no longer be a mystery to be solved.

Because when matter moves close to the speed of light, the mass of matter will also approach infinity, so that the infinite mass plus no amount of force can produce acceleration, and it will not be able to increase the velocity.

One of the basic assumptions of special relativity is the principle that the speed of light does not change. Light is an object with a rapidly changing electromagnetic field. Since it is the result of the field, and the field is the cause of the force, the phenomenon of light should not be related to the frame of reference.

In other words, the speed of light should be constant for an arbitrary frame of reference.

As for the light emitted by the flashlight, when you run after it, your time will slow down, what you think of as a meter will become shorter, so you have a different concept of speed, when you measure light, the light is still that speed.

The speed of light

The speed of light and time are in a sense the same thing. If a photon travels 300,000 kilometers per second, if it only runs 150,000, then it is not that the photon has slowed down, but that the time is twice as fast as the earth's time. If the speed of light is measured to be reduced to 0, then your time begins to rewind even relative to Earth time, and you are the speed of light.

Although this is somewhat incredible, it is actually true, which is why no powerful particle accelerator can accelerate a particle to the speed of light, because particles have a mass at rest, and through the formula of mass velocity of special relativity, we find that when a particle with a mass at rest approaches the speed of light, its mass tends to infinity.

The infinite mass requires an infinite amount of energy to further speed up, obviously the energy in the universe is limited, and the infinite is fine, anyway, the whole universe has to be swallowed.

It's possible. If it is assumed that the straight line is one and strong enough, of course, the universe does not cultivate such a substance, and this is not a solid problem, because the transmission force itself requires electromagnetic force and gravity, but their speed will not exceed the speed of light, so it takes time for the force to travel from one end of the line to the other, the fastest is the speed of light, if you want to assume that one end of the straight line moves, the other end must also move immediately, and the straight line requires no deformation, then it can only be assumed that it is an alien universe with an early calendar. The other end of the line could be faster than light. But if the straight line is the substance of the universe and not the thing of the alien universe, then the ideal maximum velocity at the other end of the line is the speed of light, and it is impossible to achieve it.

No. For straight lines with inertia, due to the speed of the line of each part, the far part of the line will drag the near part and finally bend or disconnect.

For straight lines without inertia, there are only lines like laser lines in reality. If the light source rotates, a photon is released at a certain time, and the next time the light source has turned an angle, and then a photon is released, the two photons are not in the same direction, and the other photons are the same, so the line of many photons is not a straight line. Of course, it is only on the celestial scale that the light is not straight.

Judge Tan. Only an ideal straight line in geometry can exceed the speed of light at the other end, but geometric straight lines do not exist in life.

I've thought about this problem, when the end point spread sail is close to the speed of light, the force you need is infinite, and this can be calculated by equations. Impulse i = momentum p. The two sides are time-differentiated, f=d(mv), dt.

When approaching the speed of light, the mass m, and the velocity v are both functions of time, and the specific formula is in the university physics book, which means that the speed tends to the speed of light, and the mass tends to infinity. f tends to infinity. No matter can withstand an infinite force. Complete.

The velocity tends to the speed of light, the mass tends to infinity, and for the outermost part, the kinetic energy is infinite and cannot provide this energy.