Quotes from Carlo Rovelli

Einstein'?n denklemi uzay?n dura?an olamayaca??n?, geni?lemek zorunda oldu?unu gösterir. (...) Ayn? denklem geni?lemenin minicik ve çok s?cak genç bir evrenin patlamas?yla tetiklendi?ini de öngörür: Bu da Büyük Patlama'd?r.

There is our past: all the events that happened before what we can witness now. There is our future: the events that will happen after the moment from which we can see the here and now. Between this past and this future there is an interval that is neither past nor future and still has a duration: fifteen minutes on Mars; eight years on Proxima b; millions of years in the Andromeda galaxy. It is the expanded present.28 It is perhaps the greatest and strangest of Einstein's discoveries.

A dolgok csak egymáshoz képest változnak. A világ alapszerkezetében nincs id?. Az id? múlásának érzete csupán közelítés, és csak a mi makroszkopikus mérettartományunkban érvényes.

The difference between past and future exists only when there is heat. The fundamental phenomenon that distinguishes the future from the past is the fact that heat passes from things that are hotter to things that are colder. So,

This is a tremendous result: on the one hand, taking quantum mechanics into account resolves the problems generated by the infinities of Einstein's theory of gravity, that is to say, the singularities. On the other, taking gravity i to account solves the problems generated by quantum field theory, that is to say, the divergences. Far from being contradictory, as they at first seemed, the two theories each offer the solution to the problems posed by the other!

But what we see and understand of the universe is not an infinity to drown in. It is a wide sea, but a finite one.

Evrenlerin patlad???, uzay?n ç?k??? olmayan delikler içine çöktü?ü, zaman?n bir gezegene inildikçe yava?lad???, y?ld?zlararas? uzay?n uçsuz bucaks?z enginli?inin deniz yüzeyi gibi dalgaland??? renkli ve ?a??rt?c? bir dünya...

Science, I believe, is a passionate search for always newer ways to conceive the world. Its strength lies not in the certainties it reaches but in a radical awareness of the vastness of our ignorance.

In particular, like all physical quantities, volume may not assume arbitrary values, but only certain particular ones, as I described in chapter 4. The list of all possible values is called, recall, the "spectrum." Hence, there should exist a "spectrum of the volume" (figure 6.2).

Special relativity may be summarized as the discovery that there exists a maximum velocity for all physical systems. Quantum mechanics can be summarized as the discovery that there exists a maximum of information for each physical system.

Max Planck s?cak bir kutu içinde denge durumunda bulunan elektrik alan?n? hesaplar. Bunun için küçük bir hileye ba?vurur: Alan?n enerjisinin "kuantumlar" yani enerji paketçikleri, topaklar? biçiminde da??ld???n? varsayar.

We observe the universe from within it, interacting with a minuscule portion of the innumerable variables of the cosmos. What we see is a blurred image. This blurring suggests that the dynamic of the universe with which we interact is governed by entropy, which measures the amount of blurring. It measures something that relates to us more than to the cosmos.

Without this attraction, every celestial body would move in a straight line. So the universe, then, is a large space where bodies attract one another by means of forces; and there is a universal force, gravity: every body attracts every other body.

If we try to put together what we have learned in the twentieth century about the physical world, the clues point toward something profoundly different from our instinctive understanding of matter, space, and time.

Black hole heat is directly connected to loop quantum gravity's fluctuations of the atoms of space.

Einstein ?????n paketlerden, ???k parçac?klar?ndan olu?tu?unu gösterdi. Bunlara bugün "fotonlar" diyoruz.

Bir ???k ???n?n?n enerjisinin uzayda kesiksiz biçimde yay?lmad???, uzay?n noktalar?nda yer alan belirli say?da "enerji kuantumlar?ndan" olu?tu?u, bölünmeden hareket ettikleri ve bir birim olarak üretilip so?urulduklar? varsay?m?n? göz önünde tutuyorum.

Here, on the edge of what we know, in contact with the ocean of the unknown, shines the mystery and the beauty of the world. And it's breathtaking.

A small system S does not distinguish the details of the rest of the universe because it interacts only with a few among the variables of the rest of the universe.

Ama bütün çocuklar gibi kuram da kendi yoluna gitti, Einstein da onu art?k tan?yamaz oldu. 1910'lar ve 1920'ler boyunca büyümesine yön verense Danimarkal? Niels Bohr oldu. I??k enerjisi gibi atomlardaki elektronlar?n belirli bir enerjiyle yaln?zca bir atom yörüngesinden di?erine "s?çrayabilece?ini", bunu yaparken de bir foton sald???n? veya so?urdu?unu anlayan odur.

Quantum uncertainty across the horizon of the black hole generates fluctuations of the horizon geometry. But "fluctuations" imply "probability," and probability implies thermodynamics, and therefore temperature. Concealing from us a part of the universe, a black hole makes its quantum fluctuations detectable in the form of heat.

But in physics there is nothing that corresponds to the notion of the "now.

Times are legion: a different one for every point in space. There is not one single time; there is a vast multitude of them. The time indicated by a particular clock measuring a particular phenomenon is called 'proper time' in physics. Every clock has its proper time. Every phenomenon that occurs has its proper time, its own rhythm.

Infinite', ultimately, is the name that we give to what we do not yet know. Nature appears to be telling us that there is nothing truly infinite.