Galileo Galilei: gravity, light speed and Inquisition

Science IpoopAlot August 7, 2016 0 3
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Galileo Galilei has meant a lot for science. Known work he has done in the field of gravity and the speed of light. However, not everything was taken away from him with gratitude by the Church. This article enumerates more about Galileo Galilei and his work on the speed of light and gravity, as well as the persecution by the Inquisition, the Papal Court.

Galileo Galilei and the Speed ​​of Light

Hundreds of years ago people thought that the speed of light was instantaneous. Instantaneous according to our means of Dale ?? ?? immediately. In the context of the speed of light means that once thought that the light was everywhere all at once. The light had no speed but was simply there. They thought this because for example when an artillery fire the flash of light was visible immediately unlike the sound needed some time before they heard it. Galileo Galilei did not seem likely that the speed of light is instantaneous. He proposed in 1638 for experiments to determine the speed of light. Two people stood about 1.5 km apart. They both had one with a cloth-covered lantern with him. The moment the first person pulled the cloth from the lantern and the second person saw this, he had to do the same. A third person measured the time between the first and the second lantern. Even repeated experiments failed miserably. The only thing one dared ask was that the light was at least ten times faster than sound.
At that time they did not have the measuring devices such as one which has now. Everything had to be done by feel. Now, it has been the-art measuring means to measure even down to millionths of seconds. So of course you can determine the speed of light much better. In the experiment of Galileo also have to deal with the response of man. This is about half a second. This creates a great inaccuracy. These booms quickly by adding to the determination of the speed of light. These moves so fast that you can hardly make a good estimate without proper instruments.
The speed of light is later been well established. The speed of light in vacuum is exactly 299,792,458 meters per second. In 1983, the meter by the SI was defined as:
  • The meter is the length of the path of light through a vacuum with a time interval of 1 / 299.792458-th of a second.

When people refer to the speed of light, they mean the above definition: the speed of light through a vacuum. The speed of light is usually rounded to 300,000 kilometers per second.

Galileo Galilei and gravity

The more Galileo with his colleagues talked about Aristotle, the more they were arguing. Aristotle wrote namely that a heavy falling body was always rather lower than a light body. He thought the earth pulled very hard on heavy objects and that consequently so were faster down. Galileo thought they both came down together. Galileo therefore went with his colleagues to the Pisa tower. He left at once two cannonballs of different weights fall to show that Aristotle was not right. And Galileo was right, the cannonballs were just down right. His colleague ?? s were amazed.
Later it was proved, with more precise methods, that Galileo was right. To each object is thus the earth as hard ?? ?? drawn. The speed of the objects, as they fall down, depends on the friction. A round object is much less friction than an angular object. They can move much faster through the air, they are much more streamlined. So the air flows better along the circular object, encountered less resistance. With sharp objects often creates turbulence, thereby increasing the rate extremely decreases. If you drop objects in a vacuum, they are thus all with the same gravity. In vacuum, after all, have no friction with the air. This gravity is 9.8 m / s.
The formula:
  • The formula of the gravitational vacuum is: s = ½g × t².

The G?? is the gravitational acceleration, so this is a constant 9.8 m / s. That is to say, for each second that the object falls, the speed of the object increases by 9.8 m / s. ½g you can also rewrite as 0.5 × 9.8 = 4.9. The ?? s ?? is the distance traveled, so the path traveled by the object. The ?? t ?? is the time in which the object accelerated.
Galileo Galilei has also done important work again with this law. So you see again that Galileo is a great physicist and has been very important in today's knowledge in physics.

Galileo Galilei and the Inquisition

Galileo Galilei was known in his time as a heretic. This was because his ideas were in conflict with those of the church. In the 17th century the church was extremely powerful in Italy. What the Church said was the truth and those who did not agree were to be punished, when they entered the church with this. His belief was that the theology forward should aim to explain the Bible in accordance with the established facts of science.
His actions and his ideas were not appreciated by the church. He wrote a letter to defend himself. In that letter, Galileo argued for freedom of science. Scientists were able to bring their thoughts and opinions freely go out and perform experiments to prove or disprove theories. His letter was unsuccessful.
It was a conflict with the church and on February 23, 1616 Copernicus's work was with some other works of the same tenor prohibited. Galileo was quite rapped over the knuckles by the pope and had to abide by the Ptolemy system maintained by the church. Galileo, however, refused and wrote in 1630 ?? Dialogue on the two world systems of Ptolemy and Copernicus. ?? In which he made clear that whoever the correctness of the Copernican system was not noticed a fool. This he had violated the ecclesiastical law. Galileo had to justify themselves before the Inquisition.
The trial of Galileo Galilei lasted from April 12 until June 21 1633. The charge of the church, Thou hast faith adhered to a doctrine which is false and contrary to Scripture, namely: the sun is the center of the world and moves not from east to west and you say the earth moves and is not the center of the world. On June 22, 1633 Galileo was convicted of heresy and was forced to renounce his error openly off. He was given a short jail sentence and was allowed to return in December to his rural home in Arcetri, he became closely monitored and if until his death in January 1642 the grounds of his mansion never left.
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