Public Lecture | Gravitational Waves
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- Опубліковано 20 вер 2024
- On September 14, 2015, the Advanced Laser Interferometer Gravitational-wave Observatory (LIGO) made the first direct measurement of a gravitational wave coming from deep space. That wave was generated by the collision of two black holes about 1.3 billion light-years from Earth. As the black holes violently merged, they released as much energy in a fraction of a second as our entire galaxy emits in 4,000 years. But by the time the resulting gravitational wave reached Earth it was tiny, stretching the 4-kilometer-long LIGO detectors by just a tiny fraction of the diameter of a proton. How can scientists be sure they have seen such a tiny effect? What can it tell us about one of the most violent events in the universe? Can we expect to see more gravitational waves, opening up a new type of astronomy? Brian Lantz discusses the implications of the gravity wave observation and the remarkable instruments that made it possible.
About the speaker:
Brian Lantz began working on LIGO in 1990 as an undergraduate student in Rai Weiss’s lab at MIT, where he received his PhD for LIGO-related research. Lantz then moved to Stanford to join the group of Robert Byer and Martin Fejer. There he ran the Engineering Test Facility to develop advanced concepts for LIGO and, with Dan DeBra, led research for the Advanced LIGO seismic isolation system.
Today, he is a senior research scientist at Stanford and lead scientist for the seismic isolation systems that support the optics of Advanced LIGO. He also chairs the LIGO Scientific Collaboration’s working group on seismic isolation systems for the next generation of gravitational wave detectors - a role that involves precision engineering, servo control, precision measurements, interferometer operation and making big physics experiments work.
Gravitational waves are not part of electromagnetic waves..
Black holes merger can't emmited gamma rays...
Was the ground-based LIGO’s twin detectors taking into account the elevation of Washington and Louisiana?
The LIGO “observatory” is made up of two identical and widely separated interferometers situated in sparsely populated, LIGO Hanford in Southeastern Washington State, elevation is about 550 ft (170 m)
LIGO Livingston, 3002 km away in a vast, humid, loblolly pine forest west of Baton Rouge, Louisiana, elevation is about 50 ft (15 m).
Gravitational waves vs Gravity waves, which is correct?
i luv these lectures. Thank You1
Alas, over and over, since SLAC went to a new venue for these talks, the AUDIO is very unpleasant. Slightly distorted, a lack of higher full bandwidth, and a weird kind of compression.
I so much appreciate the program though.
Thanks for the feedback, we're working on some of the settings and getting used to the new venue. Over time we should actually be better equipped in the new space but still working out the kinks.
SLAC National Accelerator Laboratory
Plzz add subb title in English for this video. So we can understand more.
fantastic lecture....really appreciated
Can gravitanial waves cause damage or be harmfull if powerfull enough? would they cause distortions strong enough to impact our lifes in any way?
the kid asked the question for me in the Q&A part. Awessome, would like to explore it further tho
He didn't mention that the name for that kind of extreme tidal force is spagettification.
They would impact like lives in every way if they happen close enough. Fortunately, the black hole merger that LIGO detected happened 1.3 billion light years away
Do the gravitational waves become detectable ones only at the time of Blackholes collision? What about the disturbance such a huge collision cause to the waves emitted by the smaller ones?
The gravitational waves propagate through space like other waves and still have to adhere to the speed limit of the universe, the speed of light
Well thinking of it as a general speed limit still works as most things adhear to it, like a real speed limit
Cool, what magnitude of distortions are we talking about? (I watched this talk a while ago and can't rewatch it right now)
Can't, ran out of data on the dongle and I need the rest on my phone. I was wondering if you, who obviously have understand this topic better then me, could help me with getting a grasp of it. You seen to have enough time to go and correct month old comments.
Also thanks for the spelling of adhere, I was wondering about that one.
Wonderful presentation, thank you.
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Thanks!
Why do the so-called experts keep referring to it as "sound"?
Because they are measuring the amplitude of the gravity wave. In an acoustic system, the amplitude produces a pressure differential which you hear as a sound.
Again I am astonished. No one knows of waht gravity exists. The graviton has not been meausered ever. So now these gravitationla waves should be named in an other way. I regard it are electromagnetich waves, which are provoked by gravity.
It are electromagnetic waves, which have some resistance for disappearing into a black hole.
it is almost the same, as that some special thoughts keep on running through the mind, refusing to disappear into a spiritual black hole inside the stem brain.
All what has been discovered happens by the big brain of scientist. So in fact is the inner world of a scientist projected into the universe.
Can your LIGO detect femton mass hole mergers at closer range, (CDM)... can your LIGO detect mass holes orbiting falling into our own galaxy core... the gravitational wave sheds from the spacetime strain mass-energy outside the mass hole time radius, so mass holes are actually nearly hollow,-does the Higgs field contribute this mass via virtual particles...
If all of the void of Space is not empty and is really Dark Matter, Gravitational Waves and Black Holes are nonsense. On the other hand, Black Stars and Gravity Currents are probable. TLU says this is what LIGO detected, not Black Holes or Gravity Waves. TLU - Rich - logicaluniverse.com
Super physics
Walmart must have had a nationwide tinfoil hat promotion. And several commenting here must have gotten a tailored, custom fit!
👍
I am focusing and ampl
So at 33:08, you're stating "whoop, there it is." With science. Got it. ;-) ua-cam.com/video/EMzoQAmK8Dc/v-deo.htmlm8s
Hmmm
Hey guys check this paper out; arXiv : 1606.06963v1 (physics. gen-ph ).
you kan't have 2 suns direckt cirkling ietsch other, there Always have to be a black hole in between
the intaglement hase to be in between
if it is not, the two suns bouch away from ietch other
back to school....lol, you missed some thing, you must be American..
Wasting time on lecture.
The lecturer is the worst at talking and explaining I've ever heard. I had to quit watching