Why does the speed of light in space remain constant, but the energy of light decreases with distanc

Principle of invariance of the speed of light: The speed of light in a vacuum is the same for any observer. The principle of invariance of the speed of light, in the special theory of relativity, refers to the fact that the propagation speed of light in a vacuum is a constant regardless of the inertial frame (inertial frame of reference) in which it is observed, and does not change with the relative motion of the light source and the frame of reference in which the observer is located.

This value is 299,792,458 meter seconds. <>

The principle of invariance of the speed of light was obtained by solving Maxwell's equations simultaneously and confirmed by the Michelson-Morey experiment. The principle of invariance of the speed of light is one of the basic starting points for Einstein's creation of the special theory of relativity. In the general theory of relativity, since the so-called inertial frame of reference no longer exists, Einstein introduced the principle of general relativity, that is, the form of the laws of physics is constant in all frames of reference.

This also allows the principle of invariance of the speed of light to be applied to all reference frames. <>

The fourth solution with the constant speed of light is the mass-speed solution, which is derived from the mass-speed relation. Einstein's mass-velocity relation: m=m0 1- 2 c2 (m is the mass of motion, m0 is the mass at rest, is the speed of the object, c is the speed of light) Description:

When an object moves at a speed much lower than the speed of light (at the human scale), the mass does not change significantly, and the increased mass is negligible. However, when moving close to the speed of light, the mass of the object increases more, and as it approaches the speed of light, the mass tends to infinity. <>

The large and small poles are connected, and the mass is infinitely large because the two poles are the same and infinitely small, and the infinitesimal mass can be regarded as zero, so the photon has no rest mass. Light is the limiting object, the size is the same, the movement and static are also the same, and the absence of static mass is the absence of moving mass. From the mass-velocity relation, it can also be obtained that when m0=0, m=0, =c, this formula is not valid.

Some people think that there can be energy without mass? It is important to know that the electromagnetic field is an energy field, and the light quantum is an energy particle, because the photon has no mass, any energy value is infinite when compared with the mass, because there is no mass, no energy is consumed in motion, except for transferring energy to other objects, the photon energy is enough to keep its speed constant.

Because light is divergent and propagating, as the propagation distance increases, a large number of photons will be distributed in larger and larger spaces, so the light received per unit area will also decrease rapidly with the increase of distance

Light is actually an electromagnetic wave visible to the naked eye, mainly composed of a type of particle called a photon, which has particle and wave properties. The current speed of light is the fastest known. When light encounters a smooth object, it is reflected and, of course, refracted by it.

There may be something that will speed up or maintain the speed of light.

Dust and nebulae, these things can block the path of light.

Because the light will also be absorbed during the journey.

This is obviously not to say that light loses energy.

Light does not lose energy in a vacuum, it travels forward in the form of electromagnetic waves, and the speed does not change in a vacuum. Only in the air will there be energy loss!

Because light travels in a divergent way, it gets darker the farther it goes.

There are many dust and nebulae in the universe.

As you move forward, you will consume some of it.

It is theoretically possible to get infinitely close to the speed of light, but in practice it is not possible.

According to the theory of relativity, as the velocity of an object increases, so does its mass. When the speed of light is reached, the mass becomes infinity. When the speed of motion increases and the mass increases, it means that more energy must be expended to accelerate it. The faster and more massive it is, the harder it is to accelerate.

Acceleration must consume energy, and since the mass and energy (fuel used for acceleration) of any man-made object is always finite, it is impossible to be in a state of acceleration forever, and the closer the speed of motion is to the speed of light, the more difficult it is to accelerate, and to reach the speed of light, an infinite amount of energy must be consumed. But it's impossible to do.

The expansion of the universe is actually the expansion of space. To understand this inflation, imagine that a balloon can inflate indefinitely. The surface of the balloon is dotted with countless spots.

The surface of the balloon is space, while the water droplets are galaxies of matter. As the balloons get bigger, so does the distance between the spots. For a person who observes points, he will see that all the points around him are moving away from him, and the farther away these points are from him, the faster they will move away from him.

This is very similar to the phenomenon we see when the universe expands and expands.

<> calculations show that the early universe expanded so fast, far beyond the speed of light, that it went from the size of an orange to the size of the Milky Way in about the blink of an eye. However, over time, the rate of expansion slowed down until about 340 billion years ago, when some currently unknown mechanisms of space expanded at a faster rate.

According to current observations, the universe expands at a rate of about 67 kilometers per second for every 3.26 million light-years it increases. According to this calculation, at a distance of 46.5 billion light-years, objects far away from us will move at the speed of light. Of course, this velocity is not the velocity of the object itself, but the apparent velocity caused by the expansion of space, which can be compared with the original balloon model.

But while not really velocity, this effect does affect our observations of the farther universe. Because the light there is infinitely extended, the result is that we can no longer see farther.

This is the concept of the observable universe, the real universe will be bigger than it, but all the information will never reach us because of the speed of light and the upper limit of information in the universe. It's like you're running toward me on a train, but the train is moving away from me at a faster speed than Zheng Manuscript shouting at Que Xiao, and you will never find me. Therefore, the immediate effect of the expansion of the universe is that we cannot observe the entire universe and probably never will.

As for whether we can reach another galaxy at near the speed of light, theoretically we can, although we may never be able to reach the edge of the universe at sub-light speeds. However, it has the potential to reach some of the surrounding galaxies.

The understanding of this statement is that not many objects are affected by the expansion of the universe, either due to the mass of the objects themselves or due to the influence of gravity.

It means that the universe is constantly expanding, but the things in the universe remain immovable.

It has to do with the referent. The rate of expansion is quite fast, and the whole galaxy will be relatively stationary.

Science has proven that the speed of light can be both surpassed and slowed down, and the reason why the speed of light is limited and constant is that the speed of light in a vacuum does not change with the relative motion of the observer.

1.Velocity refers to the unit of measurement in which an object moves through space over time, and the same goes for the speed of light. Einstein's view of space-time found that space and time can work together, changing with each other to ensure that the constant speed of light remains the same!

So no matter how fast the light source moves, when you measure the speed of light, space and time coordinate with each other to keep the speed of light at 300,000 kilometers per second! In order to guarantee the absolute nature of light, time is not absolutely constant, and space is not absolutely constant.

2.The speed of light limit means that in our universe, no matter can move faster than the speed of light, let alone more than the speed of light, not even the smallest particle; The speed of light remains the same, which means that in any reference system, the speed of light is the same and does not change due to the relative motion of the observer. The velocity he speaks of is actually the distance between the objects, i.e., the average velocity.

However, in some experiments, scientists often find that matter moves faster than the speed of light, which can slow down or even stop.

3.When the speed of motion is close to the speed of light, the relativistic mass will become infinite, resulting in the inertial mass of the object will become infinite. When the inertial mass of an object is infinite, according to Newton's equations of mechanics, in order to continue to provide acceleration to the object, an infinite force is required.

Obviously, there is no infinite force. As a result, mass objects can only approach the speed of light infinitely and cannot be achieved, let alone exceed it.

4.A theoretical system as grand as physics must have a rock-solid foundation. When the ground base is shaken, the system that looks perfect collapses.

For hundreds of years, from the Milky Way of the Solar System to the ashes, the classical theory of relative motion has never been wrong. We don't believe that there is anything wrong with the theory of relative motion, but we rack our brains to use it to explain whether the speed of light remains the same. By measuring the speed of the wind, we can know the speed at which the earth passes through the wind.

This is the absolute velocity of the Earth in the universe.

Because the speed of light can be surpassed or slowed down, it is all carried out within the framework of the theory of relativity, and has nothing to do with the limit and invariance of the speed of light.

The speed of light can be surpassed and slowed down, but the limit of the speed of light is not, after all, the highest limit has been reached, and it is impossible to change again.

The constant speed of light means that the vacuum is the same in any frame of reference and will not change with the relative motion of the observer.

This is because the way the speed of light is measured is currently limited, and the company will also be affected by the external environment.

We know that the speed of light is the absolute fastest thing in the universe, reaching up to 299792458 meters per second. At this speed, a beam of light can orbit the entire equator of the Earth in seconds, 7 and a half times around the Earth's equator in 1 second, a return between the Moon and the Earth in 2 seconds, a return between the Sun and the Earth in 16 minutes, and a return between the Earth and Pluto in 8 hours! It can be said that the speed of light is simply the insurmountable speed of this universe!

However, when it comes to cosmic distances, the speed of light is really not worth mentioning, and it is incredibly slow and tediously slow for the vastness of the universe.

Suppose that starting from Earth, we humans emit a hypothetical pulse of light every second (such as radio transmission). At this speed, the distance between the pulses is 300,000 kilometers. At the speed of light, the pulses disappear from the Earth in the blink of an eye.

However, on a new scale, you can see the time it takes for light to travel from the Earth to the Moon that we can observe, and in fact they are on average 384,000 kilometers apart. At this scale, you can actually observe that the light pulses travel relatively slowly and can be tracked with the human eye.

Then we zoom back again. For example, Earth and Mars, but in the next three minutes, we can clearly see that it takes quite a long time for light to reach Mars, and you can see that the light pulses are still moving slowly at this scale at an astonishing speed of 299792458 meters per second, and reaching the Red Planet, which is actually more than 54.6 million kilometers.

Then we jump directly out of the solar system and come to Proxima Centauri, the closest star to us, but the distance at this time can only be calculated in light years, because the distance is too far away, but even at the speed of light, this distance is still light years, and it takes years for light to get here. As for the universe, it is even more immeasurable, according to current statistics, astronomers have found that the universe is unusually large, its length is at least 156 billionLightYear. Personally, I said that at this time, even the light had to cry and faint in the toilet, the universe was too big, and human beings were too small!

Light is the fastest thing in the universe, but the real enormous distance in the universe even completely overwhelms this, you say?

Apparently you have such confusion about the speed of light and time that you can't tell the difference!

Flying in space at the speed of light for a year, the Earth naturally equals the past year. No matter how fast the speed of light is, it is only a unit of speed, and it still cannot be separated from the concept of time, unless time is distorted!

Your question has already shown that a year flies at the speed of light, and that year is actually a year on Earth. If we say we are traveling at the speed of light, is the time in the speed of light equivalent to the time of the earth?

So, the answer to this question is: time is zero in the speed of light, because the speed of light has broken through the shackles of time!

Time is not everywhere, it exists at the tipping point of speed. Beyond the velocity tipping point, time does not exist.

You need to understand this special theory of relativity, which states that the mass of an object is related to the velocity, and the greater the velocity, the greater the mass: <>

The relationship between quality and speed.

The mass of the object increases rapidly as the velocity increases, and if the velocity is close to the speed of light, then the denominator is infinitely close to zero, and the mass is infinitely larger. Kinetic energy formula, you can know infinity.

Light has no rest mass, and the rest mass is 0, so its velocity is the ultimate velocity.

The mass of a photon at rest is zero, and his mass is calculated from his energy.