What Are Gravitational Waves?

In summary, gravitational waves are ripples in spacetime caused by the acceleration of massive objects, such as merging black holes or neutron stars. Predicted by Albert Einstein's general theory of relativity, these waves travel at the speed of light and can be detected by sensitive instruments like LIGO and Virgo. Their discovery has opened a new window for observing cosmic events, providing insights into the universe's structure and the nature of gravity.
  • #1
PhysicsEnjoyer31415
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I am not familiar with this model and i am only familiar with newtonian gravity yet, and some spacetime stuff but other than that i have no idea what is a gravitational wave. Is it like a wave ? That carries gravity??? If it is a wave , can it resonate to increase amplitude??? What would a increased amplitude even mean physically??do i even have enough brain to understand this stuff? I know that fields travel at the speed of light, so does this wave also travel at speed of light?
Many more questions....please enlighten me on this topic. thank you!
 
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  • #2
What have you already found looking for answers on your own?

We can help explain things that you're having trouble understanding, but the effort has to come from you.
 
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  • #3
Nugatory said:
What have you already found looking for answers on your own?

We can help explain things that you're having trouble understanding, but the effort has to come from you.
I found that they are ripples in spacetime. I saw a image of two stars rotating and the ripples were labelled gravitational waves

Oh and they also travel at the speed of light(a NASA site) and caused by supernova and such
https://spaceplace.nasa.gov/gravitational-waves/en/
 
  • #4
PhysicsEnjoyer31415 said:
I found that they are ripples in spacetime. I saw a image of two stars rotating and the ripples were labelled gravitational waves
OK, that's a start - although as always you will get better and more helpful answers if you cite your sources so that we know whether you're being misled by a bogus explanation or misunderstanding a valid one.

Do you understand what flat spacetime is, and how spacetime curvature produces what appears to be a gravitational force?
 
  • #5
Nugatory said:
OK, that's a start - although as always you will get better and more helpful answers if you cite your sources so that we know whether you're being misled by a bogus explanation or misunderstanding a valid one.

Do you understand what flat spacetime is, and how spacetime curvature produces what appears to be a gravitational force?
I do have a basic idea of flat spacetime and a curvature in that spacetime due to mass present causes gravitation (not a force when it comes to this i think ?)
 
  • #6
OK, then the best thing you can do is get hold of Taylor and Wheeler's book "Spacetime Physics", legally available online for free, and start working through it. Take your time, don't skip any steps.

Yes, that's a fair amount of work. But then again you're basically speedrunning close to a decade of hard study to catch up with stuff that was worked over more than a century by some seriously smart people - there's no way of getting there without putting in a fair amount of work, and the people who have done it pretty much all agree that it's worth the effort.
 
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  • #7
Nugatory said:
OK, then the best thing you can do is get hold of Taylor and Wheeler's book "Spacetime Physics", legally available online for free, and start working through it. Take your time, don't skip any steps.

Yes, that's a fair amount of work. But then again you're basically speedrunning close to a decade of hard study to catch up with stuff that was worked over more than a century by some seriously smart people - there's no way of getting there without putting in a fair amount of work, and the people who have done it pretty much all agree that it's worth the effort.
Yes i was recommended this very book by users here, i have started it but not yet completed 👍
 
  • #8
PhysicsEnjoyer31415 said:
Yes i was recommended this very book by users here, i have started it but not yet completed 👍
Like I said.... Don't skip steps.
 
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FAQ: What Are Gravitational Waves?

What are gravitational waves?

Gravitational waves are ripples in spacetime caused by the acceleration of massive objects, such as merging black holes or neutron stars. They were predicted by Albert Einstein in 1916 as part of his General Theory of Relativity, which describes how gravity affects the fabric of spacetime.

How are gravitational waves detected?

Gravitational waves are detected using highly sensitive instruments like LIGO (Laser Interferometer Gravitational-Wave Observatory) and Virgo. These detectors use laser beams to measure tiny changes in distance caused by passing gravitational waves, which can stretch and compress spacetime as they travel through it.

What sources produce gravitational waves?

Gravitational waves are produced by various astrophysical events, including the merging of binary black holes, collisions of neutron stars, and supernova explosions. These events involve massive bodies accelerating in such a way that they create significant disturbances in spacetime.

Why are gravitational waves important for science?

Gravitational waves provide a new way to observe the universe, allowing scientists to study phenomena that are difficult or impossible to detect with traditional electromagnetic observations (like light). They offer insights into the nature of black holes, neutron stars, and the fundamental laws of physics, enhancing our understanding of the cosmos.

What have we learned from detecting gravitational waves?

Since the first detection of gravitational waves in 2015, scientists have confirmed the existence of binary black hole mergers and neutron star collisions. These observations have provided evidence for the existence of black holes of various masses, insights into the formation and evolution of these objects, and have opened up a new field of astrophysics known as gravitational wave astronomy.

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