What is curved spacetime?
The curvature of spacetime influences the motion of massive bodies within it; in turn, as massive bodies move in spacetime, the curvature changes and the geometry of spacetime is in constant evolution. Gravity then provides a description of the dynamic interaction between matter and spacetime. View »
How does matter curve space time?
When a smaller mass passes near a larger mass, it curves toward the larger mass because spacetime itself is curved toward the larger mass. The smaller mass is not “attracted” to the larger mass by any force. The smaller mass simply follows the structure of curved spacetime near the larger mass.
Are gravitons proven?
As Fermilab senior physicist Don Lincoln wrote in a post: “Gravitons are a theoretically reputable idea, but are not proven. So if you hear someone say that ‘gravitons are particles that generate the gravitational force,’ keep in mind that this is a reasonable statement, but by no means is it universally accepted.
What is bending space called?
This process is called compactification.
What’s spacetime made of?
In physics, spacetime is any mathematical model which fuses the three dimensions of space and the one dimension of time into a single four-dimensional manifold. Spacetime diagrams can be used to visualize relativistic effects, such as why different observers perceive differently where and when events occur.
Why does energy bend space-time?
Since matter carries energy (via Einstein’s famous relation that energy is mass times the speed of light squared), such objects will have a gravitational field and so they will distort space-time.
Can gravitons travel faster than light?
Even if gravity crosses the event horizon, it can not be said to travel faster than light.
Is the Higgs boson a graviton?
The graviton is the carrier of the gravitional force if you describe that force by a quantum field theory. Whether gravitons are a useful way to describe quantum gravity is not clear. However, what is clear is that the graviton and Higgs boson are entirely unrelated.
Why can’t quantum mechanics explain gravity?
Quantum mechanics suggests everything is made of quanta, or packets of energy, that can behave like both a particle and a wave—for instance, quanta of light are called photons. Detecting gravitons, the hypothetical quanta of gravity, would prove gravity is quantum. The problem is that gravity is extraordinarily weak.
Can space/time exist without matter?
Special & General Relativity Questions and Answers
General relativity tells us that what we call space is just another feature of the gravitational field of the universe, so space and space-time can and do not exist apart from the matter and energy that creates the gravitational field.
Is space-time a matter?
Space in our Universe is three dimensional, and when you combine it with time, you get a four dimensional quantity. When it comes to the notion of spacetime curvature, this is what General Relativity refers to. But under no circumstances should you conceive of space as though it’s a material, physical thing; it isn’t.
Is spacetime a fluid?
(Inside Science) — Spacetime is a somewhat slippery concept — Einstein described the universe in four dimensions, combining the well-known three dimensions of space with time. Physicists now suggest that spacetime may itself be a fluid, a very slippery type known as a superfluid.
Is spacetime a solid?
Some of these models predict that spacetime at the Planck scale (10-33cm) is no longer continuous – as held by classical physics – but discrete in nature. Just like the solids or fluids we come into contact with every day, which can be seen as made up of atoms and molecules when observed at sufficient resolution.
Does space behave like a fluid?
Physicists have gathered evidence that space-time can behave like a fluid. Mathematical evidence, that is, but still evidence. If this relation isn’t a coincidence, then space-time – like a fluid – may have a substructure. We shouldn’t speak of space and time as if the two were distant cousins.