Friedman model

Idea About Friedman Model

The general theory of relativity is very complex to determine and explain how the universe began over time. So Ni presents two very simple ideas – the universe we see along the aisle seems to be the same and it will be true no matter where we observe the universe from. According to the general theory of relativity, Friedman states that it would not be right for us to think of the universe as stable. In fact, just a few years before Edwin Hubble’s discovery in 1922, Friedman had an idea exactly what Hubble had discovered.

The idea that the universe would look the same along each axis is not entirely correct. Our galaxy’s light, for example, differs from other stars. But if we look at a distant galaxy, there are more or less. This reading is the same along each axis. So the hubby would look roughly the same along every axis in a comparative observation of the distances of galaxies.

The concepts of time were fairly general about the universe. But a beautiful divine discovery tells us that Friedman‘s ideas were right about our universe. In 1975, Suzanne, an American physicist, discovered a very small wave-sensitive detector working in the Bell Laboratory of Arlo Penzias and Wilson, New Jersey, to communicate with orbiting satellites. They become anxious. Read when you see their detector showing some unnecessary error (noise) that seems to be coming from a certain nick or area.

The noise was much higher when the detector was sent directly, but when it was seen at the right angle, the orbit became wider.

History About Friedman Model 

The extra density of the detector is equal to that of the detector, so they are coming from somewhere outside. It does not affect the rotation of the earth on its own axis and its travel around the sun during the day and night, but also the same sound or noise. This makes it clear that the radiation came from outside our solar system, if it did not, it would be different along with different directions.

In fact, we know that this radiation travels far beyond our visible universe. Since these seem to us to be the same even in different directions, the heat will be the same for every different nick. We know that no more than one-thousandth of this noise or word difference is observed. So Polias and Wilson unknowingly stepped in by the idea of ​​Uttmen.

Around the same time, two American physicists, Bob Fine and Jimmy Peebles, who lived near Princeton University, expressed interest in working with Tiny. They acted on Gamo’s suggestion – this George Gamo was a student of Alexander Friedman. The subject of their research was that the universe was very hot at first and Dhanpur white glow. The boss argues that these can still be seen because the light from far away in space has only now reached us.

However, the expansion of the universe means that this light seems to deviate from the red. Selling small waves. Just after the publication of Opibus’s work, Penzias and Wilson realize that they have already discovered it. For this, Pelagius Wilson received the Nobel Prize in 1986, which is sad for Dick-Pebloom.
Now, on the basis of these data at first glance, it can be said that the universe looks the same along any axis which carries a special indication that our position is special in this universe. To be sure, since all the galaxies are moving away from us, we are observing that we must be at the center of the universe.

2nd Concept About Friedman Model 

From any galaxy, the universe looked the same along every axis and this was the second concept of the Friedman model.

We have no scientific evidence for or against Friedman‘s idea. Courtesy we believe it. It would be a very significant idea if we could see the universe the same way along each axis, but not from any other place. According to the Friedman model, galaxies move away from one another directly. This is exactly what happens when a balloon is filled with air. As the balloon expands, the distance between the droplets increases, but nothing can be said to be located in the center.

Moreover, the farthest drop or point will quickly move further away. Similarly, according to Friedman model, any two galaxies run proportionately far apart between them. So it is safe to assume that the red deviation galaxy will be proportional to the distance from us right this is exactly what Hubble discovered.

Hubble’s model and conjecture were so successful that Friedman’s actions were largely unknown to the West. A similar model was discovered in 1935 by the American physicist Howard Robertson and the British scientist Arthur Walker, who discovered Hubble’s well-organized universe in response to his theory of expansion, and our knowledge of Friedman  model has grown ever since.

Rules About Friedman Model

Although Friedman speaks of only one model, there are actually three models that adhere to Friedman’s two ideas. In the first, the Friedman there-universe expands so slowly that the gravitational force slows down the expansion between different galaxies and eventually stops it. Then the galaxies run towards each other and the universe shrinks. The distance between two adjacent galaxies is from zero to maximum and from maximum to zero again.

The second type of solution-the universe is expanding so fast that the gravitational force cannot stop it slows it down very slightly. The distance between the two galaxies starts from zero and moves away from each other while maintaining a constant velocity.

Lastly, the third type of solution is that the universe is expanding in such a way that it does not shrink in every number. In this case, the galaxies become detached from zero, and the distance increases. However, the galaxies that keep moving away get smaller but the speed never turns to zero.

A notable feature of Friedman’s first model is that the universe is not in an infinite position, but it has no boundaries. Gravity is so strong that it gives it a circular shape like the earth. If one starts traveling around the earth (along a certain axis) it will return to the starting point without any hindrance.

Then the position of the Friedman model is the same but not two-dimensional like the surface, but three-dimensional. The fourth dimension time theory is infinite but like a line. There are two endpoints or boundaries: a beginning, an end. Later we will see that when one combines the general relativity theory and the law of quantum uncertainty, both space-time will seem to be finite without any limit or edge.

The idea is that someone started their journey from the corner point of the universe. And to finish there again would be good science fiction, but it doesn’t have an ecological basis, because it shows that the universe would shrink back to zero sizes before anyone could finish their journey. He must travel faster than the speed of light to get back to where he started. But this is not possible at all.

Which model of Friedman explains our universe?

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Will the universe continue to expand, or begin to shrink, or will continue to expand forever? To answer this we need to know the rate at which the current universe is expanding and the current average density in this universe. If this density is less than a transition value and the velocity of expansion is found, then gravity is too weak to stop the expansion of the universe. However, if this density exceeds this transition value, then the gravitational force will be able to slow down the expansion of the universe in the future and it will shrink again.

We can use the uplifting effect to determine the current expansion rate of the universe, the speed at which other galaxies are moving away from us. It can be found out very accurately. Since we do not know the distances of galaxies well, we can measure them indirectly. We find that the universe expands at a rate of 10 percent per thousand million years. Undoubtedly, the average density of the universe is higher than this. If we combine the mass of all the stars, we will see that it is less than 1 percent of the mass of us and other galaxies – as much as necessary to stop the expansion of the universe.

In this case, however, the speed of expansion must be calculated at the lowest speed. But we know that there are huge amounts of black matter in our galaxies and other galaxies that we don’t see directly. But we do know that this is due to the effect of the gravitational ball on the galaxy’s stars and gas. Furthermore, most galaxies are located within clusters, and we may similarly think that the presence of more black in galaxies may be due to the rotation of galaxies. When we look at the colors in this calculation, only one-tenth of the force can stop the expansion of the universe.

There may also be other objects in other forms that have not yet been determined, which could increase the average density to prevent the expansion of the universe up to the equinox value.

So far, the evidence is that the universe will continue to expand forever. But it is not final. We can only be sure that if the universe ever shrinks again, it will not happen at least tens of millions of years ago. Although the universe has already expanded at about the same time. This is nothing to worry about, if during this time we have a colony outside the solar system, or if mankind does not die through the death of our sun.

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