what is speed with which graviton travel?

Question

i have heard about some very minute particles called 'GRAVTONS' which are spreaded over all the matter of the universe. It is some property of these gravitons due to which they attract things on which other gravitons are lying.

Answer 1

firstly it was a very old concept. as gravitational force act even in between infinetly distant bodies so it must travel at infinite speed and nothing can travel faster than light(3lakh km/sec) so it is not regarded as stasfactory theory but NOW SCIENTIST THINKS THAT IT MIGHT TRAVEL AT THE SPEED OF LIGHT LIKE OTHER 0MASS PARTICLES AND FOR THE GARVITATIONAL FORCE THE TRAVEL IN WORM HOLES THE SHORTCUT IN SPACE AND TIME AND SOME THINK THAT GRAVITATIONAL FORCE DO NOT ACT VIA GRAVITONS .IT IS JUST DUE THE FORMATION OR YOU CAN SAY DISTORTION OF SPACE AROUND ITSELF.
I HOPE THIS WILL HELP.BUT I AM SORRY IF YOU CAN GET IT CLEARED AND FOR THAT I SUGGEST YOU TO READ 'a brief history of time" by STEPHAN HAWKING.(AS I DON'T HAVE A GREAT COMMAND OVER LITERATURE)

Answer 2

This is a very interesting and timely question. There was recently an experiment which aimed to measure the speed of gravity, and there has been some disagreement among scientists over the interpretation of the results.

In the theory of relativity, the speed of gravity should be equal to the speed of light, since the theoretical "particles" that carry gravity (sometimes called gravitons) are massless particles, just like photons (the particles that carry light). The light from the Sun takes 8 minutes to reach the Earth, so that if the Sun suddenly disappeared it would take 8 minutes before it got dark. Similarly the Earth would also feel the effects of the Sun's gravity for 8 minutes after it magically vanished.

In September 2002, two US scientists made some very accurate measurements of the position of a quasar as it passed behind Jupiter. They argued that the exact amount of apparent motion of the quasar (as the path of the radio waves from it was bent in Jupiter's gravitational field) depended on both the speed of light AND the speed of gravity. The measurements they took then proved that the speed of gravity is the same as that of light, ruling out some of the more bizarre modifications to the laws of gravity which have been proposed, and further backing General Relativity (http://news.bbc.co.uk/2/hi/science/nature/2639043.stm ).

However, other astronomers disagree that the experiment is able to measure the speed of gravity, arguing that the effect is much smaller than the scientists claim and that (in effect) they got their arithmatic wrong when they decided that the speed of gravity did come into the equations. They are not claiming that the speed of gravity is different to that of light, just that it could not be measured in the experiment.

I have to confess that I don't have enough knowledge of the details of General Relativity to know who is right, but I think this is an interesting insight into how science works.

So the short answer is that it is thought that the speed of gravity should be equal to the speed of light, and that there is a ongoing disagreement over whether or not that has actually been measured.

Answer 3

Gravitons are just hypothetical.
How can you ask about their speeds??

Detecting a graviton, if it exists, would prove rather problematic. Because the gravitational force is so incredibly weak, as of today, physicists are not even able to directly verify the existence of gravitational waves, as predicted by general relativity. (Many people are surprised to learn that gravity is the weakest force. The dominance of gravity at large scales is due to the fact that the nuclear forces have a limited range, and the electromagnetic force often largely cancels due to the existence of positive and negative charges. In contrast, gravitational charge -- i.e., mass -- is positive for all known forms of matter.)

Gravitational waves may be viewed as coherent states of many gravitons, much like the electromagnetic waves are coherent states of photons. Projects that should find the gravitational waves, such as LIGO and VIRGO, are just getting started.

Answer 4

A graviton is a hypothetical elementary particle that mediates the force of gravity in the framework of quantum field theory. If it exists, the graviton must be massless (because the gravitational force has unlimited range) and must have a spin of 2 (because gravity is a second-rank tensor field).

Answer 5

Gravity waves travel at the speed of light. If Gravitons exist they make up gravity waves.

Answer 6

lets put it this way... I wont believe in a graviton untill I see one lol...

Answer 7

9.81 m/s power -2.....on earth that is.