The photons they are particles of light, determined as a quantum of electromagnetic energy or light, the Photons in everything are in motion and in a vacuum they have a firm speed of light for all those present. Learn more about this topic in this article!
What are Photons?
When we think about light, we don't really think about what it's made of, this was actually the subject of one of the most important arguments in physics, for a long time, physicists and Important scientists they tried to determine whether light was a wave or a particle.
There were XNUMXth century physicists who firmly believed that light was made of basic units, but certain properties like refraction caused light to be reclassified as a wave, it would take none other than Einstein to solve the problem, thanks to him and the work From other renowned physicists, we know more about Photons.
It is important to note that Photons are the main particle of light, they have a unique participation in both a particle and a wave, this is what allows the photons unique involvements such as alteration and diffusion, however, light particles are not exactly the same as other basic particles.
They have interesting characteristics that are not commonly observed, first, as of now physicists theorize that Photons are massless, they have some particle characteristics such as angular momentum, but their frequency is independent of the influence of mass, they also do not carry charge .
Photons are basically the most visible portion of the electromagnetic spectrum, this was one of the major breakthroughs that Einstein and the father of quantum physics, Planck made on the nature of light, this link is what is behind the photoelectric effect that makes solar energy possible.
Because light is another form of energy, it can be transferred or converted into other types, in the case of the photoelectric effect, the energy of Photons of light is transferred through the photons that collide with the atoms of a given material, this causes the atom that is hit to lose electrons and produce electricity.
Generalities
Photons played a key role in the founding of quantum physics, the study of photon properties opened up a whole new class of fundamental particles called quantum particles, thanks to the photons, we know that all quantum particles have the properties of waves and particles, we also know that energy can be discreetly measured on a quantum scale.
Photons also played an important role in Einstein's theory of relativity. Without him Photon we would not understand the importance of the speed of light and with it the understanding of the interaction of time and space that it produces.
We now know that the speed of light cannot be broken down by natural means, as it would require an infinite amount of energy, something that is not feasible in our universe, so without the photon we would not assume the knowledge about our universe that we now have.
Properties
A photon is a massless neutral particle, the photon's spin is the particle is a boson, but due to zero rest mass, helicity is the most suitable feature, the projection of the particle's spin in the direction of motion.
The rest mass of the photon is considered equal to zero, according to the experiment, a difference in the mass of the photon from zero would lead to the scattering of electromagnetic waves in the vacuum, which would stain the observed images of galaxies in the sky and theoretical justifications .
In quantum field theory, it manifests itself when the mass of the photon is not equal to zero, then the electromagnetic waves would have three states of polarization instead of two, this means that the speed of a photon, like the speed of any particle without mass is equal to the speed of light.
The photon refers to the calibration bosons, it is involved in electromagnetic force and gravitational, a photon spends part of the time as a virtual particle, a vector meson or as a virtual hadron-hadron pair, due to this phenomenon the photon can participate in strong interactions.
Evidence for the participation of a photon in strong interactions is the photoproduction of mesons in protons and neutrons, as well as the multiple formation of nucleons in protons and nuclei, the cross sections for the photoproduction of nucleons by protons and neutrons are very close to each other. the other.
Photons are expressed in many natural processes, such as when an electrical charge is rapidly stirred, when an atom or nucleus passes from an excited state to a state with a lower energy, or when an electron-positron pair annihilates, in the reverse processes, atomic excitation, production of electron-positron pairs, photon hydration occurs.
Photodissociation
It is the decomposition of any compound into photonsDue to an interaction between one or more photons with a target molecule, photodissociation is not limited to visible light.
Any photon with sufficient energy can affect the chemical bonds of a chemical compound, since the energy of a photon is inversely proportional to its wavelength, electromagnetic waves with energy of visible light or higher, such as ultraviolet light, lightning X and gamma rays are typically involved in such reactions.
technological applications
Photonic sources are one of the most important enabling technologies for quantum technologies, their flexibility has been one of the cornerstones of the field, allowing theory and experiment in quantum optics and quantum information science to progress rapidly hand in hand.
A single grain of light, a quantity of light, is known as a photon, it's easy to produce many Photons, when you shine a light, or if you want something more special, a laser, but these produce classical states of light, we're developing quantum technologies that they are capable of generating a single quanta, or perhaps two entangled quanta, of light at a time.
It is only in this regime where its quantum nature can be guaranteed, designed and exploited for emerging applications, quantum communication is an area where these key enabling technologies are essential, but they are also useful for photonic sensors or in the context of the quantum internet, connecting other different and distant quantum technologies.
There are various different technologies of non-linear processes where the photons laser declining into two correlated or entangled photons, there is already a wide range of options here, but recently it has focused on exploiting integrated photonic solutions to make them more scalable.
An interesting property is that if you detect one of the Photons you know the other was also generated, these are called advertised Single Photon sources, the next challenge is true Single Photon sources that emit a photon on demand, each time we press a button.
These are again made using a wide range of techniques and materials and progress has been significant in recent years and already a couple of European companies are selling these devices.
Structure
The photons they are complex since they are quanta of light, they behave as waves and as particles, Maxwell's equations describe light as an alternating electric field and an alternating magnetic field that travels at the speed of light.
Einstein showed that the photon has a particle nature, a photon has no mass, but it has energy and momentum, since it has no mass, it must travel at the speed of light.
Quantum mechanics describes electric and magnetic fields as being caused by the exchange of virtual Photons, therefore there is a strong connection between Photons and electric and magnetic fields, Photons strongly interact with charged particles.
Other particles such as electrons can also behave like particles and waves, electrons are considered point particles without size, a photon does not behave like a point particle, they behave as if they have a size related to wavelength.
A good example of this is the mesh reflector, the door of the microwave oven has a metal mesh that prevents the microwaves from escaping, but lets in light so you can see the cooking process, this means that the microwaves photons microwaves are too large to pass through the mesh and are reflected. Having a size implies having a structure.
The structure of photons derives from quantum fluctuation in fermion and anti-fermion quantum field theory and has been an experimentally established feature of electrodynamics since the discovery of the positron.
In deep inelastic scattering, the Finite Photon virtuality ensures that the time scale in which the process takes place is short and the photon acts as a point exchange boson, towards smaller photon virtualities, the photon becomes almost real and in photoproduction, it can fluctuate to a final hadronic state.
Is the Photon a Wave or a Particle?
The Photon is an electromagnetic wave, however, some of its characteristics show that it also behaves as a set of particles, this is what is called wave-particle duality, when we consider all the objects of the microscopic universe.
An electromagnetic wave such as light transcends without a material medium, light is a sinusoidal wave and vectorial due to the fact that light energy is transferred by an electromagnetic wave, it is developed by an electric field E and a magnetic field B perpendicular to each other, in phase of the same wavelength and perpendicular to the direction of transmission of the wave, therefore the light wave is perpendicular.
The Photon in Particle Physics
In Newtonian mechanics, momentum is defined as the product of the mass of the object and its speed, the theory of relativity generalizes this notion to particles moving at the speed of light, such particles can exist, they have zero mass and its momentum is the ratio of the particle's energy to the speed of light in a vacuum.
The country question can only be answered by taking Einstein's methodological rigor into account, particularly in the field of quanta. Einstein always distinguishes these works from those dealing with relativity, he is perfectly aware that he is advancing on delicate ground.
If his works on relativity, albeit very daring, answer a question that has been debated for a long time, the concept of the photon, on the other hand, opposes a wave interpretation of light, accepted for decades by physicists, proposing another vision it requires good arguments, a lot of caution and great precision.
What are photons used for?
Both photons and protons can be used to transfer energy in radiosurgery, photons they are discrete aliquots of energy produced in gamma or irradiation, while gamma rays and X-rays consist of Photons.
Their Photons are produced in different ways, gamma rays, used in Gamma Knife radiosurgery, use Photons created by radioactive decay, while X-rays used in linear accelerator radiosurgery use Photons.
When did the concept of photon first appear?
The concept occurred in the year 1905 in the explanation of Albert Einstein, in which he raised the existence of prudent energy packets during the transmission of light, earlier in the year 1900, the Quantum Planck Theory had paved the way for the concept by explaining that heat radiation is expressed and attracted in different mechanisms, or quanta.
The concept came into general use after the American physicist Arthur Compton demonstrated in 1923, with the corpuscular nature of radiographs, however the term photon was not used until 1926, the energy of a photon depends on the frequency of radiation.
There are Photons of all energies, from high energy gamma rays and X-rays, through visible light, to low energy infrared and radio waves, all photons They travel at the speed of light.
What relationship do Photons have with photovoltaic solar energy?
Sunlight is made up of photons or particles of solar energy, these photons have versatile amounts of energy that belong to the different wavelengths of the solar spectrum.
Only the attracted ones provide energy to form electricity, it is important to say that when the integrated circuit material attracts enough sunlight, the electrons detach from the atoms of the material.
The specific method of the material surface at the time of manufacturing makes the outer surface of the cell more akin to dislodged or self-contained electrons, so that the electrons naturally migrate to the cell surface.
