- Can gravitons be dark matter?
- Is time a particle?
- How did Einstein explain gravity?
- How fast is gravity?
- What does boson mean?
- Has the graviton been found?
- Do gravitons have mass?
- Can gravitons travel faster than light?
- How do gravitons transmit gravity?
- Can scientists explain gravity?
- What does a graviton look like?
- Why do we need gravitons?
- Does gravity exist without mass?
- Does light have mass?
- Is gravity a particle or a wave?
- Is gravity considered matter?
- How are gravitons created?
- What is a graviton in physics?
- Is anti gravity possible?
Can gravitons be dark matter?
We consider the possibility that the massive graviton is a viable candidate of dark matter in the context of bimetric gravity.
We first derive the energy-momentum tensor of the massive graviton and show that it indeed behaves as that of dark matter fluid..
Is time a particle?
Time comes from every particle within our bodies, including our DNA that is made of these same atoms and particles. Time is the frequency of longitudinal energy waves. However, time is not constant. It changes with motion.
How did Einstein explain gravity?
GETTING A GRIP ON GRAVITY Einstein’s general theory of relativity explains gravity as a distortion of space (or more precisely, spacetime) caused by the presence of matter or energy. A massive object generates a gravitational field by warping the geometry of the surrounding spacetime.
How fast is gravity?
The best results, at the present time, tell us that the speed of gravity is between 2.993 × 10^8 and 3.003 × 10^8 meters per second, which is an amazing confirmation of General Relativity and a terrible difficulty for alternative theories of gravity that don’t reduce to General Relativity! (Sorry, Newton!)
What does boson mean?
: a particle (such as a photon or meson) whose spin quantum number is zero or an integral number — compare fermion.
Has the graviton been found?
One consequence of that: while scientists know of particles associated with the strong, weak and electromagnetic forces, they have yet to discover a particle of gravity, or graviton. … “The most important result is the possibility of verifying the quantum nature of the gravitational field,” said Sawyer.
Do gravitons have mass?
Gravitons do indeed have mass, and their motions generate kinetic energy. … Other particles have mass, but they are much larger, much less numerous, and cannot substitute for the gravitational effects which generate space curvature. The great mystery of so-called force at a distance is explained by the mass of gravitons.
Can gravitons travel faster than light?
“Nothing can propagate faster than light” is a condition in GR. Gravitons are not postulated by GR. … Gravitons, or otherwise – gravity is the one that stops light from escaping the black hole. Same would not apply to gravity.
How do gravitons transmit gravity?
Though gravitons are individually too weak to detect, most physicists believe the particles roam the quantum realm in droves, and that their behavior somehow collectively gives rise to the macroscopic force of gravity, just as light is a macroscopic effect of particles called photons.
Can scientists explain gravity?
Gravity is most accurately described by the general theory of relativity (proposed by Albert Einstein in 1915), which describes gravity not as a force, but as a consequence of masses moving along geodesic lines in a curved spacetime caused by the uneven distribution of mass.
What does a graviton look like?
In an attempt to marry gravity with quantum theory, physicists came up with a hypothetical particle—the graviton. The graviton is said to be a massless, stable, spin-2 particle that travels at the speed of light. The graviton remains hypothetical, however, because at the moment, it’s impossible to detect.
Why do we need gravitons?
In the case of gravity, those particles are known as ‘gravitons’. Most theorists believe that gravitons must exist, because quantum theory has successfully explained every other force of nature. … Quantum theory predicts that as gravity has an effectively infinite range, the graviton must have an incredibly low mass.
Does gravity exist without mass?
The only way to get gravity is with mass. The more mass, the more gravity you get. Without mass, you can’t have gravity. … The force of gravity that we feel is actually just an acceleration towards the center of the Earth at 9.8 meters per second squared, or 1G.
Does light have mass?
Light is composed of photons, so we could ask if the photon has mass. … The answer is then definitely “no”: the photon is a massless particle. According to theory it has energy and momentum but no mass, and this is confirmed by experiment to within strict limits.
Is gravity a particle or a wave?
Gravity is a force. For all other forces that we are aware of (electromagnetic force, weak decay force, strong nuclear force) we have identified particles that transmit the forces at a quantum level. In quantum theory, each particle acts both as a particle AND a wave. This is called duality.
Is gravity considered matter?
Gravity is a force pulling together all matter (which is anything you can physically touch). The more matter, the more gravity, so things that have a lot of matter such as planets and moons and stars pull more strongly. … The more massive something is, the more of a gravitational pull it exerts.
How are gravitons created?
While photons are spawned by movement in electrons, gravitons are whelped by energy and mass. Gravitons are massless, but they do carry energy. This means a graviton can create more gravitons. Like other quantum particles, gravitons can carry a lot of energy, or momentum, when confined to a small space.
What is a graviton in physics?
Graviton, postulated quantum that is thought to be the carrier of the gravitational field. It is analogous to the well-established photon of the electromagnetic field. Gravitons, like photons, would be massless, electrically uncharged particles traveling at the speed of light.
Is anti gravity possible?
Gravity’s draw is simply masked by the free-falling motion of a spacecraft as it circles the planet. Only way out in deep space, beyond the domain of any planets or stars, can you truly escape gravity. As of yet, no technology exists to neutralize the pull of gravity.