Quotes About Space-time

A warp," Nita whispered. "A tunnel through space-time. Are you a white hole?" It stopped bobbing, stared at her as if she had said something derogatory. (Do I look like a hole?)

I cannot stress this enough - if you try to install an HDTV in a non-HDTV compatible house, you may tear the space-time continuum.

In real time, the universe has a beginning and an end at singularities that form a boundary to space-time and at which the laws of science break down.

Ultimately, my Ph.D. is in mathematical physics, focusing on quantum field theory and curved space-time, and I worked with Stephen Hawking.

one has a singularity contained within a region of space-time known as a black hole.

Consider the apparent dimension of the universe. According to M-theory, space-time has ten space dimensions and one time dimension. The idea is that seven of the space dimensions are curled up so small that we don't notice them, leaving us with the illusion that all that exist are the three remaining large dimensions we are familiar with.

In the classical theory of gravity, which is based on real space-time, there are only two possible ways the universe can behave: either it has existed for an infinite time, or else it had a beginning at a singularity at some finite time in the past.

The mass of the sun curves space-time in such a way that although the earth follows a straight path in four-dimensional space-time, it appears to us to move along a circular orbit in three-dimensional space.

So, one can regard the pair of particles as a single particle moving on a closed loop in space-time. When the pair is moving forward in time (from the event at which it appears to that at which it annihilates), it is called a particle. But when the particle is traveling back in time (from the event at which the pair annihilates to that at which it appears), it is said to be an antiparticle traveling forward in time.

We must accept that time is not completely separate from and independent of space, but is combined with it to form an object called space-time.

region of space-time known as a black hole.

time is not completely separate from and independent of space, but is combined with it to form an object called space-time.

In general relativity, bodies always follow straight lines in four-dimensional space-time, but they nevertheless appear to us to move along curved paths in our three-dimensional space. (This is rather like watching an airplane flying over hilly ground. Although it follows a straight line in three-dimensional space, its shadow follows a curved path on the two-dimensional ground.)

For every event in space-time we may construct a light cone (the set of all possible paths of light in space-time emitted at that event), and since the speed of light is the same at every event and in every direction, all the light cones will be identical and will all point in the same direction.

Namun teori relativitas memaksa kita mengubah secara mendasar gagasan kita mengenai ruang dan waktu. Kita harus menerima bahwa waktu tidak sepenuhnya terpisah dari ruang, tapi malah berpadu dengan ruang untuk membentuk objek bernama ruang-waktu (space-time).

We thus have experimental evidence both that space-time can be warped (from the bending of light during eclipses) and that it can be curved in the way necessary to allow time travel (from the Casimir effect).

The field equations and the whole history of general relativity have been complicated.

Black holes can bang against space-time as mallets on a drum and have a very characteristic song.

They sped along the conduits reserved for the subtle messages of subatomic particles, space-time's hidden circuitry.

His physical body, this physical body was not—could not be—in the past. But gravity could. Like Tars said, gravity cut across and through all of the dimensions. When he punched at one of them, what he was really doing was sending a pulse through space-time, a gravitic surge that was responsible for moving the books.

Now comes the real magic. In pre-relativistic Newtonian mechanics, momentum is represented by a three-vector given by mass times velocity, . In the world of relativity, we define the four-momentum in an analogous way, as mass times four-velocity:

The minus sign in the proper-time formula (6.2) opens up an interesting possibility. If we consider a straight path that traverses equal amounts of space and time, (?x)2 = (?t)2, we will have ? = 0. So the object moves, but no proper time elapses along its journey.

As impressive as matrix mechanics was, it suffered from a severe marketing flaw. The mathematical formalism was highly abstract and difficult to understand. Einstein's reaction to the theory was typical: A veritable sorcerer's calculation. This is sufficiently ingenious and protected by its great complexity to be immune to any proof of its falsity. This from the guy who had proposed describing space-time in terms of non-Euclidian geometry.

Christopher Nolan's 168-minute odyssey through the space-time continuum is stuffed with stuff of bewildering wrongness.