Quotes About Relativity

Hold on tight, because we are about to take off. "NOW" MEANS NOTHING What is happening "now" in a distant place? Imagine, for example, that your sister has gone to Proxima b, the recently discovered planet that orbits a star at approximately four light-years' distance from us. What is your sister doing now on Proxima b? The only correct answer is that the question makes no sense. It is like asking "What is here, in Beijing?" when we are in Venice.

There is no "truer" time; there are two times and they change relative to each other. Neither is truer than the other. But there are not just two times. Times are legion: a different one for every point in space. There is not one single time; there is a vast multitude of them.

Ten years before understanding that time is slowed down by mass,21 Einstein had realized that it was slowed down by speed.22 The consequence of this discovery for our basic intuitive perception of time is the most devastating of all.

Proper time" depends not only on where you are and your degree of proximity to masses; it depends also on the speed at which you move. It's a strange enough fact in itself, but its consequences are extraordinary. Hold on tight, because we are about to take

The idea that a well-defined now exists throughout the universe is an illusion, an illegitimate extrapolation of our own experience.

But it is not only space that curves: time does too. Einstein predicts that time on Earth passes more quickly at higher altitude, and more slowly at lower altitude.

In our everyday life we move at low speeds in relation to the speed of light and so we do not perceive the discrepancies between the different proper times of different clocks, and the differences in speed at which time passes at different distances from a mass are too small for us to distinguish. In the end, therefore, instead of many possible times, we can speak only of a single time: the time of our experience—uniform, universal, and ordered.

Kütle çekim alan? uzayda yay?lm?? de?ildi, çekim alan? uzay?n ta kendisiydi.

Ama bükülen yaln?zca uzay de?ildir; zaman da bükülür. Einstein zaman?n yüksekteki bir konumda, dünyaya yak?n, daha alçak bir durumdan daha h?zl? akt???n? öngörür.

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.

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.

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.

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

The time indicated by a particular clock measuring a particular phenomenon is called "proper time" in physics.

This is how time is depicted in Einstein's general theory of relativity. His equations do not have a single "time"; they have innumerable times.

Physics does not describe how things evolve "in time" but how things evolve in their own times, and how "times" evolve relative to each other.*

Time has lost its first aspect or layer: its unity. It has a different rhythm in every different place and passes here differently from there.

And it's here that Einstein's extraordinary stroke of genius occurs, one of the greatest flights in the history of human thinking: what if the gravitational field turned out actually to be Newton's mysterious space? What if Newton's space was nothing more than the gravitational field? This extremely simple, beautiful, brilliant idea is the theory of general relativity.

Planets circle around the sun, and things fall, because space around them is curved.

first theory of relativity (known today as "special relativity"), the theory that elucidates how time does not pass identically for everyone:

the gravitational field is not diffused through space; the gravitational field is that space itself.

Where time passes uniformly, in interplanetary space, things do not fall.

There are absolute masterpieces that move us intensely: Mozart's Requiem, Homer's Odyssey, the Sistine Chapel, King Lear. To fully appreciate their brilliance may require a long apprenticeship, but the reward is sheer beauty—and not only this, but the opening of our eyes to a new perspective upon the world. Einstein's jewel, the general theory of relativity, is a masterpiece of this order. I