Gravity’s Kiss: The third ripple(mitp.nautil.us)
mitp.nautil.us
Gravity’s Kiss: The third ripple
http://mitp.nautil.us/feature/159/gravitys-kiss
9 comments
"1) The Daily Mail and Barack Obama apparently made the same mistake about Einstein's predictions."
Einstein predicted the phenomena of gravitational waves mentioned by Obama, but Einstein did not predict the gravitational wave chirp of coalescing black holes detected by LIGO and mentioned in by The Daily Mail.
Einstein predicted the phenomena of gravitational waves mentioned by Obama, but Einstein did not predict the gravitational wave chirp of coalescing black holes detected by LIGO and mentioned in by The Daily Mail.
The US military has had an SBIR out for years to develop a gravitational wave radio. It could go right through the earth, no need for satellites. The transmitter though would probably use enough energy to destroy the enemy, maybe even the whole Earth.
Do you have a link to support your affirmation?
The gravity waves detector are enormous. To get a good signal, the gravity waves emitter must be enormous too. I haven't done the calculation, but I doubt that gravity waves can pass through the Earth. Gravity affect dirt and it will absorb the waves.
The gravity waves detector are enormous. To get a good signal, the gravity waves emitter must be enormous too. I haven't done the calculation, but I doubt that gravity waves can pass through the Earth. Gravity affect dirt and it will absorb the waves.
Gravity waves don't "go through" the earth but rather the earth expands and contracts in space-time. This contracting and expanding of the earth itself, although minute, is the evidence and detection of gravity waves.
I know about LIGO, but ...
Can LIGO "see" only upwards or it can "see" downwards too? Neutrinos can pass though the Earth because they only interact with week force and gravity, and both have a very small coupling. Can "gravitons" pass though Earth?
As someone noticed in an comment a few months ago, there is no experimental evidence of the gravitons and no complete theory about them, but I think it's a good guess.
So, in other words, the minute contracting and expanding of space inside the Earth while the gravitational waves pass though it must interact with any particle with mass. The coupling is weak, but there are plenty of them. So some of the energy of the waves will be dissipated as heat inside the Earth. How much of the energy of the waves is lost while passing though the Earth?
Can LIGO "see" only upwards or it can "see" downwards too? Neutrinos can pass though the Earth because they only interact with week force and gravity, and both have a very small coupling. Can "gravitons" pass though Earth?
As someone noticed in an comment a few months ago, there is no experimental evidence of the gravitons and no complete theory about them, but I think it's a good guess.
So, in other words, the minute contracting and expanding of space inside the Earth while the gravitational waves pass though it must interact with any particle with mass. The coupling is weak, but there are plenty of them. So some of the energy of the waves will be dissipated as heat inside the Earth. How much of the energy of the waves is lost while passing though the Earth?
Can "gravitons" pass though Earth?
They must be able to do so, for essentially exactly the same reason that neutrinos can: they couple extremely weakly to matter. Which should not be a surprise, because gravity is such a relatively weak force- weaker even than the eponymous "weak force". The fact that neutrinos couple so weakly to other matter is also why they are so dang hard to detect. Meanwhile, gravitons / gravitational waves couple even more weakly to matter, and thus are correspondingly even harder to detect than neutrinos, and pass through solid matter even more easily.
Annoyingly, if it were easier to detect them, that would necessarily imply that the Earth is less transparent to them, and vice-versa: they harder they are to detect, the more transparent the Earth must be. Because, if the Earth were not transparent to them, then that entails that there are materials in the Earth that interact strongly with them, and we could use those materials to build a better detector!
Gravitational waves and gravity waves are not the same phenomena.
https://www.quora.com/What-is-the-difference-between-a-gravi...
Wouldn't it be easier to use neutrinos?
The only slightly surprising things (I won't go as far as to say "interesting") are:
1) The Daily Mail and Barack Obama apparently made the same mistake about Einstein's predictions.
2) Without comment:
> Later I will discover that my major thesis about social construction, which turns on pointing out that no gravitational waves were seen but merely a few numbers that were interpreted as gravitational waves, has been thoroughly anticipated (albeit on a strange, flat-earther YouTube channel that appears to treat conspiracy theories as an art form).