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KBon
Just a thought I had...
Parallel to the axis of orbital angular momentum the intensity is tiny.snorkack said:For the common source of gravity waves - inspiralling black holes - are there any directions of space into which gravity waves are not emitted, for reasons of symmetry?
What would it look/feel like? Would there be gravity changes / oscilations?mfb said:Ah, I interpreted the question as interaction. The regular wave interference is still there at any intensity, of course.Parallel to the axis of orbital angular momentum the intensity is tiny.
Well, that´s about the hearing threshold for healthy human ear. Wasn´t sure whether it is 0 db or 1 db that is quietest sound which can be heard.mfb said:1 decibel is an odd value to choose, but whatever.
The 10-21 stretch of gravity waves sounds like a small number, but the 10-12 stretch of 1 db sound also sounds like a small number.mfb said:we get 10-12 length changes. Most parts of the human are significantly softer and will deform more.
Maybe.snorkack said:So could sufficiently strong gravitational waves be perceived directly by naked ear as a quiet sound?
mfb said:10-12 is the stretch in bones, everything else will be stretched more, especially the eardrum.
The body parts would expand/shrink to their original size, assuming the frequency is low enough to make that possible. Different body parts would follow at different speed.stefan r said:The gravity wave is stretching space time. You would not feel anything.
mfb said:The body parts would expand/shrink to their original size, assuming the frequency is low enough to make that possible. Different body parts would follow at different speed.
mfb said:LIGO is so long that the mirrors are effectively floating in space relative to each other. Your human body is not (at the frequencies LIGO is interested in).
I am not an expert on this topic. Gravity waves passing through the galaxy would dissipate if energy was doing work on the molecules in objects.The area enclosed by the test particles does not change and there is no motion along the direction of propagation.[citation needed]
Gravitational waves - gravity waves are something different.stefan r said:Gravity waves passing through the galaxy would dissipate if energy was doing work on the molecules in objects.
mfb said:If the distances within a solid object decrease in one direction and increase in another, it induces stress in the object.
The difference between 10^-12 and 10-21 is a billion to one, so assuming things being equal, the gravity wave would have to be at least one billion times stronger to be heard. I think if you actually were close enough to say a binary black hole to hear it you would be in deep doo doo.snorkack said:Well, that´s about the hearing threshold for healthy human ear. Wasn´t sure whether it is 0 db or 1 db that is quietest sound which can be heard.
The 10-21 stretch of gravity waves sounds like a small number, but the 10-12 stretch of 1 db sound also sounds like a small number.
Certainly 1 db sound at 250 Hz does not feel like "being pushed/pulled" - it is felt by ears alone.
So could sufficiently strong gravitational waves be perceived directly by naked ear as a quiet sound?
Slightly ovoid. But I think it is fine to think of both tides and rotation as creating an oblate spheroid. A spheroid is a special case of ellipsoid where 2 axis are equal.snorkack said:And tides also distort spheres into ellipsoids. Correct?
litup said:The difference between 10^-12 and 10-21 is a billion to one, so assuming things being equal, the gravity wave would have to be at least one billion times stronger to be heard. I think if you actually were close enough to say a binary black hole to hear it you would be in deep doo doo.
litup said:The difference between 10^-12 and 10-21 is a billion to one, so assuming things being equal, the gravity wave would have to be at least one billion times stronger to be heard. I think if you actually were close enough to say a binary black hole to hear it you would be in deep doo doo.
Can we change that to "minimum distance". 300 km/s is easier if you calculate in your head, 0.1% light speed. 1000 years to go from 1.414 light years to 1 light year.snorkack said:If a 60 solar mass black hole were to fly by Solar System at a distance of 1 lightyear, at a relative speed of 200 km/s, what effects are to be expected on Solar System?
mfb said:If there is no matter falling in, we would just note the gravitational lensing effect on starlight passing close to it, most notably in Gaia data.
The heliopause and termination shock would move further from the sun in the direction of the black hole.
Yes, it is possible for gravitational waves to interfere with each other and cancel each other out. This is known as destructive interference and occurs when two waves with equal amplitude and opposite phases meet.
Yes, gravitational waves can also interfere constructively and amplify each other. This occurs when two waves with equal amplitude and phases meet, resulting in a larger amplitude wave.
Gravitational waves interfere with each other when they overlap in space. This can occur when two sources of gravitational waves are close enough to each other, or when a single source produces multiple waves at different frequencies.
Yes, gravitational waves from different sources can interfere with each other. This is known as superposition and occurs when two or more waves overlap in space. The resulting wave is a combination of the individual waves.
When gravitational waves interfere with matter, they can cause the matter to vibrate or oscillate. This can be observed in the form of ripples in space-time or changes in the shape of objects. However, the effects of gravitational waves on matter are very small and difficult to detect.