Public Lecture | Gravitational Waves
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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.
Comments
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This is an example of poor science. Here they feature experts who base their claims on one (1) example of having discovered theorized gravitational waves. That certainly is not the scientific method, and more an example of "scientific stupidity". Notwithstanding that this theorized "wave" must be traveling faster than light since the "combined" event horizon(s) deny light to escape. Indeed, the very idea that zero (0) - a black hole - is an actual entity/material object defies common sense, but "scientists" and their unthinking minions still try to reify their theorized Unicorns ... that can't be seen, touched, or laboratory tested ... Indeed, this is part of the same scientific "consensus" which still deny that electrical energy from the Sun changes the ground current(s) of the Earth. Their claim, "There is no charge separation in space". They still call plasma, "Gas" and that it is held in volume by magnetic fields which confine it. I doubt even one of these grant grabbing geeks knows what a double-layer happens to be ... and YOU, TOO!
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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 am amplifying and focusing centripetal force. Control and development of flight and movement of goods cheep. Interested in people to develop software to control the systems, build working models and grant writer's to attain funding.
Contact
Sal Coco
860 315 3539 -
I am focusing and ampl
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fantastic lecture....really appreciated
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I assume the mirrors need to be kept perfectlt parallel do they? Perpendicular to the Earth? Being a pendulum, gravity assures this too?
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Im confused about how the merged black hole can be less massive than the two colliding black holes. If nothing can ever escape a black hole, how is this mass loss possible?
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Why do the so-called experts keep referring to it as "sound"?
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Recent detection of gravitational waves has confirmed analysis based on the General Theory of Relativity (GR) that wave solutions to the GR equations are possible. It is proposed that these wave solutions of GR are not restricted to particular wave frequencies and can therefore provide an explanation for the wave propagation of light and other electromagnetic waves. It places gravitational waves, radio waves, light waves, X-rays and Gamma rays on a spectrum of frequencies of spacetime waves in spacetime.
More about the Spacetime Wave Theory here:
https://www.academia.edu/5927513/The_Spacetime_Wave_Theory
Or search Google for:
Richard Lewis The Spacetime Wave Theory -
i could understand this. thank you slac. slides are great!
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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?
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"Can you surf gravitational waves?" lol That's awesome.
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Can gravitanial waves cause damage or be harmfull if powerfull enough? would they cause distortions strong enough to impact our lifes in any way?
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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...
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So at 33:08, you're stating "whoop, there it is." With science. Got it. ;-) https://youtu.be/EMzoQAmK8Dc?t=33m8s
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Hmmm
Hey guys check this paper out; arXiv : 1606.06963v1 (physics. gen-ph ). -
I love science, but my brain hurts xD
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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. -
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i luv these lectures. Thank You1
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