Modern Physics

The principle of relativity

The principle of relativity shows that nothing is absolute and that everything is relative. One of the main contributors to this principle was Albert Einstein.

The principle of relativity came about from the moment when the deepening of studies focused on the microcosm and the atomic structure of matter could not be explained by classical physics. This fact intrigued the scientific society, because it seemed that the laws of nature, previously understood, began to obey new laws.

The study of relativity showed the scientific society that its theories were somewhat outdated; there was, in fact, no precision and exactitude in what was done, something else was missing.

And the “something else” was exactly relativity. Many physicists refused to believe that everything that had been studied and discovered before that moment was incomplete, while others abandoned their studies and research.

Today, a century later, we can daily take advantage of this study, called modern physics. Through it, today it is possible to have predictions that are much more exact and precise than before, such as, for example, calculating the time when the sun will set today, with adjustments existing up to the nanoseconds, but in some other cases also the Uncertainty is the only certainty we have, such as what happens to objects that enter a black hole.

All this new discovery was necessary to show physicists that nothing is absolute and that everything is relative.

This was necessary, too, to show them that things were not as they thought. Physicists believed that they were on the verge of discovering a full understanding of the behavior of nature and the laws that govern the universe. All the new knowledge acquired by physicists served to show them their limitations even though they had so much wisdom.

Albert Einstein contributed a lot to the development of this principle, because he showed that old ideas about relativity were wrong.

Einstein’s theory provided accurate results for all possible velocities that had never been observed.

Conclusion: Relativity is dedicated to the study of events, such as: where they happen, when they happen and what is the distance that separates them in space and time.

Two postulates on which Einstein’s theory is based:

1. There is no absolute frame of reference. The laws of physics are the same for all inert (at rest) frames.

2. The speed of light is the same in all directions, that is, it has the same value in all inertial references.

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