Does light slow down as it passes through a medium

The speed of light slows down as it passes through the medium. As light passes through the medium, it is constantly refracted and reflected, changing the direction of propagation, and at the same time, the speed is slowed down due to the increase in obstructions.

The propagation speed does not slow down, but the propagation distance becomes longer, and depending on the refraction of light, light is refracted as it passes through the medium, so it gives the illusion that the speed of light slows down.

After entering the medium, the light particles keep refracting and reflecting to increase their own motion length, so that they do not slow down, but travel longer distances.

The speed of light is different in different mediums because different mediums have different energy contents. Think of light as a bounded region of energy (photons) moving in space-time. When its E1 energy travels through space-time at point C, it generates an electric and magnetic field because its E1 energy interacts with the E0 energy of the space-time energy medium.

The speed of light is always one quantum distance (1qd 1qt) for each quantum unit of time. The unit of quantum time does not change, but the quantum distance is relative to the amount of energy in the underlying medium along the path of the photon. When there is more energy in the medium, the relative quantum distance decreases comparatively.

Photons move in space-time at a speed of c (1qd 1qt). As it passes through a different medium such as glass, the E2 energy of the glass increases the energy along the photon path and the relative quantum distance decreases. Since it takes the same QT to move one QD, there are now more QDs that need to cross the ......It seems to us that light (outside of the energy medium) moves more slowly.

Gordon's theory of all things also suggests that the E2 mass energy extends outwards infinitely from the object containing the mass. When a photon crosses the energy gradient that exists in its path, the photon on the higher energy side of its path is slowed down. Deceleration on the photon's side will cause the photon to "bend" in the direction of mass.

In addition, when the energy of a certain space-time region increases, we think that time in that region has slowed down. This is why time is slower in areas where the gravitational field is higher, and there is more E2 energy in those regions.

If the material has molecules, it's a bit more complicated. Think of molecules as balls, connected by springs. The atoms in the molecule are bouncing, but just like the orbitals of electrons, there are also allowed and forbidden bouncing modes.

Photons can be absorbed to propel electrons to higher orbits, or absorbed to push high bounces. For example, microwaves emit photons at well-known frequencies (gigahertz) that excite the junction between hydrogen and oxygen (the junction becomes more and more elastic). That's because the microwave only heats the food and not the dish.

There was water in the food, not on the plates. Drink more water, spend less time heating....Less water, more time warm.

Photons can be absorbed or promoted to allow electrons to be higher orbitals (or molecular high spring states), but in fact orbital or spring states are allowed, and electron molecules are uncomfortable states with a lower energy state that is more "attractive". Then, the electron molecule can reach that energy level and "spit out" a photon to release the excess energy. The light then "magically" changes frequencies as it travels through matter.

Because different media have different effects on the speed of light, the speed is different during propagation.

Because in different media, the propagation speed of the speed of light is also different, different media will affect the propagation of light, and in some media that are conducive to the propagation of light, the speed of light will increase.

Light is an electromagnetic wave, and in a medium, the speed of light slows down due to the electromagnetic action of the medium itself, which has an obstructive effect on the propagation of light. Different media hinder light differently.

Because the propagation speed of light in different media is not the same, it is affected by their mass, so it is also different.

No matter what environment the light is in, it will be hindered by propagation, and the size of the obstacle is also different for different media, so the speed of light will also be fast or slow.

In a vacuum, this is the maximum speed of light that can be reached, and no object can exceed this speed.

It is slightly smaller in air, but the decreasing value is negligible.

in the water about. m/s。

in the glass about.

m/s。In the diamond about.

m/s。

The frequencies of various lights are not the same.

In general, the speed of light v=c n, if the refractive index is different, then the speed of light is not the same, and it is the fastest in red.

Because it has the least frequency.

The frequency is different, that is, the wavelength is different, light is electromagnetic wave, and the speed of electromagnetic wave in the medium is not only related to the medium itself, but also related to the frequency of light, for example, red light is larger than violet light in glass.

Also pay attention. In a vacuum, i.e. without a medium, the propagation of various types of light is not affected differently as in other media.

So in a vacuum, the various light travel velocities are the same.

Speed of light: The speed at which light waves or electromagnetic waves travel in a vacuum or medium.

300,000 kilometers per second, (approximately) should be km, how to write m, don't make this mistake.

The propagation velocity of light in vacuum and light in air is 3*10 to the 8th power m s.

The speed of light propagation in water is 3 4 of the speed of light propagation in air, i.e. to the 8th power m s.

The propagation velocity of light in glass is 2 3 of the propagation velocity of light in air, i.e. 2 * 10 to the 8th power m s.

The speed of light propagation in the medium v is related to the refractive index n of the medium, v = the speed of light propagation in the air c n.

Extended] Microscopic solution of refractive index

From the perspective of electromagnetic waves, it is argued that the electromagnetic field of incident light will disturb the charged particles (mainly electrons in atoms) in the medium, and the disturbed charged particles will re-emit electromagnetic waves, and the new electromagnetic waves will have a phase shift compared with the original incident waves. Of course, the final result we see is the superposition of the electromagnetic waves emitted by the disturbed charged particles and the original incident electromagnetic waves, and the combined result is that the electromagnetic waves travel slower.

This is a general explanation, the actual medium is more complex and diverse, there will be complex dispersion and so on. Most of the time, the incident electromagnetic wave not only disturbs the individual charged particles independently, but also interacts with each other in the medium, forming an overall motion (such as lattice vibration), which makes the electromagnetic field in the medium more complex. But in essence, it can be understood as the result of the interaction between the electromagnetic field and the charged particles in the medium.

The speed of propagation of light in different media: 299792458 3 10 ms in a vacuum.

Light is a physical term whose essence is a stream of photons in a specific frequency band. A light source emits light because the electrons in the light source gain extra energy. If the energy is not enough to make it jump to a more outer orbit, the electrons undergo an accelerated motion and release the energy in the form of a wave.

If the transition is followed by just enough to fill the vacancy in the orbit and from the excited state to the stable state, the electron stops transitioning. Otherwise, the electrons will jump back to their previous orbits again and release energy in the form of waves.

The history of the study of light, like mechanics, has been noticed in the ancient Greek era, and the law of reflection of light has been known as early as the time of Euclid, but before the separation of natural science and religion, human understanding of the nature of light has hardly improved, and it only stays at the level of understanding of the propagation and use of light.

In 1925, the French physicist de Broglie put forward the theory that all matter has wave-particle duality, that is, all objects are both waves and particles. To sum up, the essence of light should be considered as photons, which have wave-particle duality.

Light has four important characteristics at the same time:

1. In geometrical optics, light travels in a straight line. This is illustrated by the straight pillars of light and the sun's rays.

2. In wave optics, light travels in the form of waves. Light is like water waves on the surface of the water, and different wavelengths of light appear different colors.

3. The speed of light is extremely fast. 299792458 3 10 ms in a vacuum, slower in air. In media with a larger refractive index, such as water or glass, the propagation speed is slower.

4. In quantum optics, the energy of light is quantized, and the quanta (elementary particles) that make up light are called light quanta, referred to as photons, so they can cause chemical changes in film photosensitive emulsions and other substances.

The speed of light does not change not because of the medium of propagation, but because the speed of light itself does not require any object as the medium of propagation, and its speed always remains the same.

Many people may only understand the beam as fast as it is. Many people are not particularly familiar with the term "invariant speed of light". In fact, the significance of the constant speed of light lies in the fact that it means that the propagation speed of the speed of light in a vacuum is derived relative to the reference frame, so the constant speed of light also has its essential meaning.

Actually, it's a little more straightforward. In fact, the speed of light is in the absence of any state of motion, no matter what state of motion the light source is presented, it remains the same, not to say that the speed gradually accelerates, take the theory of relativity, as well as some mechanics of flow, it always refers to one of the truths.

However, for light, in fact, it is also an electromagnetic wave, and everyone knows that the medium is needed to propagate the wave, but the speed of light does not actually need the propagation medium, and the state and trajectory they present are also determined by their own characteristics.

And scientists also tell us that the speed of light actually does not need any reference, it just remains unchanged relative to others, and it is precisely because of this relativity that the speed of light does not change, it can exist in a field, and this existence is an objective fact and does not need too much to prove. Just like what we have learned now, a lot of knowledge just needs to remember the conclusion, because the process is already pushed and no other proof is needed, which can be designed from many times.

Speaking of the speed of light, in fact, when we were very young, we often joked that what is the fastest speed in the world, that is, the speed of light, if you can surpass the beam, then it is possible to achieve time and space travel. In fact, I don't know if this hypothesis really exists, and maybe one day in the future it will bring us a little miracle.

First of all, it is necessary to clarify what the constant speed of light is. The constant speed of light means that the speed of light does not change with the speed of light source movement, that is, the speed of light has nothing to do with the state of light source motion! It's different from ordinary objects, so people think it's weird, but it's not strange!

The light source emits light only when the light source emits electromagnetic waves outward, when the electromagnetic waves leave the light source, they propagate to the distance according to the law of electromagnetic field propagation, and it is normal that it has nothing to do with the movement state of the light source, just as the speed of sound has nothing to do with the motion state of the sound source, when the sound source transmits the energy of vibration to the surrounding air molecules, its propagation speed is only related to the air, and has nothing to do with the motion state of the sound source!

It must be a problem of the medium, the vacuum is also the medium, the speed of light in the glass drops, and the speed of light in the water is not the same, this is the obvious fact, open my eyes and say nonsense, some people say that they want me to learn the theory of relativity, haha, I don't know how many times I have deduced the amount, it can only be said that it is a simple mathematical calculation, and the theory has many contradictions.

The speed of light does not change because of the medium of propagation, but because of the physical properties of light itself.

The propagation of light differs from sound in that the medium of propagation of light in the air is not a physical substance. The medium of propagation of light is massless. There is no relative motion relationship between the observer and the optical medium. Therefore, the speed of light does not superimpose with the speed of the observer.

If the speed of light is always flying in a vacuum, of course, it will not change. What if you leave the vacuum? That's bound to change.

The constant speed of light means that the speed of light is fixed regardless of the medium. As a result, scientists often use the speed of light to measure distances. The unit is light years.