The constant speed of light is experimentally confirmed, but why does the speed of light not change?

Because whatever is the frame of reference.

The speed of light remains constant, and at the same time, it is also the "upper velocity" of the universe, which is Einstein's theory of relativity.

The cornerstone of the system! We all know that the most "earth-shaking" innovation in physics must have been brought about by Einstein!

Before the birth of this wise generation, the physics community thought that classical mechanics was still available.

The physical "high-rises" have been built, flawless; As a result, Einstein's "theory of relativity" was like a thunderbolt from the sky, which pushed the entire academic community to start all over again!

Albert Einstein famously asserted that "the speed of light does not change"! At the same time, this is also the first meaning of the "special theory of relativity" to take effect! However, this golden rule has been repeatedly doubted by some people!

Because, according to common sense, any speed should be relative;

That's right, Newton.

In the "Absolute View of Time and Space", this is how we understand the change of speed! However, Einstein used empirical evidence to tell us that the "speed of light" is not only insurmountable, but also always maintained at a speed of 300,000 kilometers per second, without interruption!

Why does the speed of light not change? The earliest is, of course, empirical! The scientific community compared the speed of light with all the frames of reference and found that it was constant!

From a macroscopic point of view, the speed of light does not change, which also determines the iron law of our universe. Because the world in which human beings live is three-dimensional;

Time, space, and gravity influence each other and tolerate each other, forming a stable "triangular relationship", and the speed of light is the bond that maintains their wholeness! In Einstein's theory, a change in velocity causes "Lorenz."

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Eventually, it will lead to the conversion of time and space, so the speed of light must become a "golden rule" for the universe to continue! Suppose one day, we find that the speed of light has finally changed;

Then, mankind should have entered the "four-dimensional world"!

The theory of relativity expounds that the speed of light in vacuum is a space-time bound state, and that the speed of light is a fixed value due to space-time. That is, space-time tells matter how to move, and this movement includes how much speed it moves, and it is the nature of space-time that determines the speed of light.

The speed of light is constant, which is in the special theory of relativity, and in a vacuum, the speed of light is constant for any observer. As for why the speed of light does not change, it may be because the conditions that affect the speed of light have not changed.

For no reason, the invariance of the speed of light is a common assumption of the theory of relativity, which has not yet been proven. You may have heard of the Maxon Morey Interference Experiment, which proves that the speed of light does not change, but it only proves that Israel does not exist.

Quite simply, because the whole dynamic universe is a variety of light waves intertwined, like a perpetual motion net, and the basic particles follow the light waves, from one substance to another, never stopping. Light is the source force of the universe, and light waves are the structure of matter. If the speed of the particles in the body exceeds the speed of the particles of the structure, the structure of the body of matter disappears, and the body of matter will disintegrate and reconstruct, which is why the speed of light does not change.

If the speed of light is always measured in space, of course it is always the same speed. The speed of light in a vacuum is constant. If always in a vacuum. And once you leave and come to Earth, the speed of light changes.

Einstein's theory of relativity states that the speed of light is independent of any frame of reference, and that the speed of light is the same regardless of where the light emitted by the same light source is observed.

The constant speed of light means that the speed of light is independent of the speed of light source movement, regardless of whether the light source is moving or not, the speed of light is 299792458 meters per second. Why is this happening? Because light is an electromagnetic wave, unlike an ordinary object.

Ordinary objects have mass, they have inertia. Holding a gun on a high-speed train with bullets in it, the bullet has moved with the train before it is fired, and when the bullet is fired, the speed of the bullet is superimposed on the speed of the train. Whereas, electromagnetic waves are different from bullets in that they have no mass and no inertia.

When light is emitted from a light source, the speed of the light source is not superimposed, so the speed of light has nothing to do with the movement of the light source!

If the propagation speed of the electromagnetic interaction is finite, then the oscillations of the electromagnetic field in an infinitesimal time can only affect an infinitesimal region, and will not be affected by distant observers or moving objects, i.e. independent of the reference frame, i.e. the speed of light remains constant.

The propagation velocity of electromagnetic interactions is finite according to Maxwell's equations.

Do you choose to believe in Newton, or choose to believe in Maxwell?

Einstein chose to believe in Maxwell.

The properties of photons are very stable and do not change with changes in the external environment. The photons that make up the beam are super stable and do not undergo denaturation.

Can the constant speed of light be related to the force that holds up the entire universe, and the speed of light should be a displacement phenomenon of particles, could it be matter?

The speed of light does not change, it is just an operational choice and operational convention.

Chan's model of the universe: Because light is a medium wave.

Light-speed systems and faster-than-light systems exist.

The constant speed of light has not been directly verified by experiments, isn't that a basic assumption?

The principle of invariance of the speed of light is a basic assumption of Einstein's special theory of relativity, and even Einstein himself named the "theory of relativity" "invariance" at the beginning.

To put it simply, it is intended to convey the idea that "whether you are walking in the same direction or opposite to the light, the speed of the light relative to you is constant". The speed of light is constant and constant.

In reality, objects A and B move in a straight line with velocities A and B respectively, and if the two objects are moving opposite each other, the relative velocity between them is actually (A + B), and the relative velocity when traveling opposite each other is |a - b|。But the speed of light is not affected by this.

Although this is only a hypothesis, the results of various experiments so far are consistent with this hypothesis, and it has not been proved wrong, so it is regarded as an axiom by everyone. The speed of objects on Earth is so slow that it is difficult to observe (a + b) and | compared to the speed of lighta - b|and therefore difficult to confirm experimentally.

There are no fast enough objects on Earth, so go to the universe to find them. Therefore, one of the more convincing proofs is to use the light travel difference of the star.

Who is the founder of Kaidan's appearance, Sun Xisu's unchanging traces? （）

a.Einstein.

b.Michelson.

c.Lorenz.

d.None of the above.

Correct answer: B

The mathematical structure of Maxwell's equations (Lorentz symmetry) already implies a special theory of relativity, so the speed of light can be deduced from Maxwell's equations as invariant.

Of course, this derivation requires the additional assumption that the permittivity and permeability of a vacuum are independent of different inertial frames. In the way we teach electrodynamics in modern times, this seems obvious. But historically, this is a big assumption.

Because the prevailing view in the nineteenth century was that light travels in the medium "ether" (since all fluctuations found before light waves require a medium to propagate). The permittivity and permeability are properties of ether, not vacuum. If the permittivity and permeability (or even the entire set of Maxwell's equations) vary with the observer, the above proves to fail.

The light travel difference experiment shows that it is impossible for the "ether" to move with the Earth (otherwise, in the above figure, when the starlight comes near the Earth, it is dragged by the Earth and has a lateral velocity, and the telescope does not need to tilt the planet at an angle). That is, either the aether does not move with the earth, or there is no aether.

The light travel difference was discovered as early as the seventeenth century, and the above explanation was given in the eighteenth century. It is so "classical" that many books on relativity omit this part. But logically, the light travel difference experiment is an important part of the experimental verification of the invariance of the speed of light (otherwise, in the case of the Michelson-Morey experiment alone, the aether is explained by the movement of the earth with the aether -- the speed of the human voice is the same in different directions on the earth, and does not change because the earth revolves around the sun).

Then there is the familiar Michelson-Morey experiment (1887). By the way, Michelson is American. At that time, the level of scientific research in the United States was not high.

I wonder if the Michelson-Morey experiment is the first "world-class" achievement in modern American science (at least the first Nobel Prize in the United States). In 1894, the United States surpassed the United Kingdom in terms of GDP to become the world's largest and remained so until the date of writing.

The Michelson-Morey experiment proves that the velocity of light does not change in different directions (the error is much less than the speed of the Earth's revolution) by means of a slowly rotating optical interferometer. Therefore, the speed of light is constant, does not depend on the frame of reference (the Earth), and does not satisfy Newton's principle of superposition of velocities.

Of course, another modern understanding of the speed of light is the aforementioned one, and theoretically, special relativity treats the invariance of the speed of light as a basic false faux pat accompaniment, making it the starting point of theoretical deductive methods (similar to axioms in mathematics), which does not need to be proved.

The experimental basis for the principle of invariance of the speed of light is (residual judgment).

a.Particle scattering real hole source test.

b.Thomas Young's Light Interferometry Experiment.

c.Newton's prism decomposes the sun's rays and quivers.

d.Michelson-Morey experiment.

Correct answer: d

Finally, the constant speed of light also provides us with a way to explore the universe. Since the speed of light is a limiting speed, we can only learn about matter and energy in the universe by looking at light. For example, we can understand the structure and evolutionary history of galaxies by observing starlight and demolition; Learn about the origin and evolution of the universe by observing the cosmic microwave background radiation.

Finally, the constant speed of light also provides us with a way to explore the universe. Since the speed of light is a limiting speed, we can only learn about matter and energy in the universe by looking at light. For example, we can learn about the structure and evolutionary history of galaxies by observing starlight; Learn about the origin and evolution of the universe by observing the cosmic microwave background radiation.

The constant speed of light is a fundamental assumption of the theory of relativity. The theory of relativity is a theory about space-time proposed by Albert Einstein in the early 20th century. According to the theory of relativity, the speed of light is constant because light is an electromagnetic wave, and the propagation speed of electromagnetic waves is related to the nature of the electromagnetic field.

In the theory of relativity, the speed of light is not only a physical constant, but also a limiting speed, and no object can exceed the speed of light because they will have more and more chatter, and eventually they will not be able to reach the speed of light.

In conclusion, the constant speed of light is the basic assumption of the theory of relativity, which provides us with a standard for measuring time and space, as well as a new way of understanding the physical world and exploring the universe. As science and technology continue to evolve, we believe that the concept of a constant speed of light will continue to play an important role.

Einstein proposed that the speed of light remains constant in different frames of reference, which means that there is no superposition of speeds at the speed of light. In the article "The Nature of Gravitation", I proposed that the "gravitational field" is a fluid with static pressure. Gravitational force is the "wind force" created by the flow of a "gravitational field" fluid from distant space toward the center of the Earth.

We can measure the wavelength of light waves through double-slit interferometry experiments to determine whether the speed of light changes in the gravitational field. The relationship between light waves and the speed of light is: c f ( is the wavelength of light, c is the speed of light, f is the frequency of light).

Double-slit interference experiment 1: fix a laser pointer on the indoor ground (monochromatic light is required and the frequency of the light is required to be fixed). Let the light shine parallel to the direction of gravity on the top ceiling.

Cover the light source with an opaque baffle above the laser pointer and make two narrow slits in the baffle to allow the light to pass through the double slit and hit the ceiling. The wavelength of the light is calculated from the interference fringes on the ceiling, and the wavelength is: xd l.

Experiment 2: The light from Experiment 1 is reversed, that is, the laser pointer is fixed on the ceiling, so that the light rays shine on the ground parallel to the direction of gravity, and the interference fringes are displayed on the ground. The wavelength of the light is then calculated based on the interference fringes on the ground:'x'd'/l'。

Analyze experimental data.

According to the principle of velocity superposition, the relationship between wavelength and the speed of light is: c-v) f,'c+v) f, (v is the velocity of the gravitational field, c is the velocity of light when the velocity of the gravitational field is zero).

Now comparing the above two experimental data, if , then the speed of light changes in the gravitational field. Conversely, if c f. This means that the speed of light does not change in the gravitational field, which proves that Einstein's assumption that the speed of light does not change.