Gravitational wave astronomy -- opening a new window on the Universe | Martin Hendry | TEDxGlasgow
Вставка
- Опубліковано 24 лип 2024
- This talk was given at a local TEDx event, produced independently of the TED Conferences. Did you know that gravity can bend space and time, and that clocks run faster at the top of a skyscraper? Martin Hendry describes how Einstein's theory of gravity shapes our modern world, and how lasers, at the heart of the most sensitive scientific instruments ever built, are opening a whole new way of studying the cosmos.
Martin Hendry is Professor of Gravitational Astrophysics and Cosmology at the University of Glasgow. He is part of a global team of more than 900 scientists leading the search to detect gravitational waves, the ripples in space and time predicted by Albert Einstein and produced by some of the most violent events in the cosmos: exploding stars, colliding black holes, perhaps even the Big Bang itself.
About TEDx, x = independently organized event In the spirit of ideas worth spreading, TEDx is a program of local, self-organized events that bring people together to share a TED-like experience. At a TEDx event, TEDTalks video and live speakers combine to spark deep discussion and connection in a small group. These local, self-organized events are branded TEDx, where x = independently organized TED event. The TED Conference provides general guidance for the TEDx program, but individual TEDx events are self-organized.* (*Subject to certain rules and regulations)
Well, today is February the 11th, 2016. And they just announced that Gravitational Waves got detected !
+Rahaf S good ..science progress is very very speed than i thought !
+emad mahdy Progressing fast than the speed of light! MIND BLOWN!!!
+Rahaf S Here's a good source: Nikola Tesla debunks Albert Einstein's "Spooky" "Action at a Distance", "Faster than Light", "Photoelectric Effect", "Splitting an Atom", "Ether", "Curved Space", Space-Time Fabrication, Nuclear Power Safe, Bomb Hoax nikolateslasolar blogspot com/2015/10/nikola-tesla-debunks-albert-einsteins html
+Rahaf S yeah so they tell us, but how do they know it's a gravity wave when they don't know what gravity is ?
They were detected in September 2015
That's my cosmology lecturer!
"Truth shall set us free". A truely remarkable discovery. we have come a long way from being protobiological blob in primordial soup. we are on cusp of unlocking the secrets that cosmos hold. I thank all the people involved with Ligo on behalf of mankind.
Now, sir gravitational waves discovered, wow ... Congratulationl LIGO !
Thank you sir for such a lucid and simple explanation
So this was before... awesome.
The mirrors seem incredible to me - their smoothess, their suspension, the multiple reflections, etc. Nice lecture.
Now we can finally work on space ship with warp drive capabilities.
Thanks Einstein for gravitational wave and Alcubierre for warp speed!!
Much earlier than expected! Jan 1st 2017 was his predicted time to detect gravitational waves. Hope these next detectors come online soon.
Amazing!
I myself made a video explaining the gravitational wave phenomenon in celebration of this enormous leap in our understanding of the universe :D so hyped about this
they did make that find way before they expected. I wonder if this will be the nobel prize candidate this year
+Nikola Tesla yes ..I think it must be
+Nikola Tesla Nobel Prize for any Science related project generally takes 5 - 10 years. They take that much time to make sure that theory and proof are rock solid,
+Nikola Tesla Sure thing.. Thats axiomatic to say
+Samuel Walworth welp the higgs boson NBP was awarded the same year of its discovery.. no?
+Nikola Tesla Oh yes they actually detected the signal in the engineering phase, when the labs weren't officially running. They had already fine tuned the instruments though, so it's a safe signal (not to mention they already detected 2 more, but those aren't fully analyzed yet)
Great explanation. You might be so happy when you get to know that LIGO has detected gravitational waves.
Sorry for being painful but it wasn't Einstein who said that space and time were actually not separate things (5:50). It was actually his maths teacher, Hermann Minkowski
(Minute 6) What's the advantage in having mass exert action at a distance on space-time instead of other masses? Exchange gravitons (as you exchange photons in electromagnetism) and you're quite good to go
I have a question: If those gravitational waves are going to expand/shrink each one of those LIGA arms, doesn't that expand/shrink the wavelength of the light passing through those arms as well? I mean the number of peaks/valeys on the light that's going to travel through the arm would stay the same (distance and wavelength, both expanded/shrunk) and the final interfering beams are going to be in phase. Can someone describe this to me?
+SAHM check Javad Fardaei Gravitational waves, is the best
+SAHM "gravity waves" detected by this advance ligo lazer capacitance chamber are actually an effect known as electromagnectic phase rarefraction. nothing to do with space-time relativity. if you read the thesis on the ligo website there is alot of inconsistencies such as measurements found during engineer pahse and not testing phase i.e human interference. the binary blackholes collided 1.3 billion years ago and measured now. the results of measuring a small change in phase doesnt not constitue a "gravitational wave" its rarefraction
hier222
Sorry, I couldn't understand your comment.
its electromagnectic phase rarefraction not d-waves once you research that you'll understand the wave phase mechanics
+SAHM I had the same question. It led me to this: scitation.aip.org/content/aapt/journal/ajp/65/6/10.1119/1.18578;jsessionid=2wvhipcejl86q.x-aip-live-06
This is quite over my head and will take me a while to absorb, but maybe it's what you're looking for.
never give up making videos!
Not a bad prediction. Only about a year off! Good work!!
Very good predictor this guy is
It is found , it is DONE !
Congratulation :)
This is British Matt Damon.
+SaketG i think more on the side of Irish or Scottish
Scottish
Erm... Scottish people are British
ask a Scottish person and they may say otherwise.
+MassDynamic No, not after the referendum
Mandal Asked yesterday if the Gravitational Waves could be cut. However silly that sounds I think it has been "cut" already. If you look at this video, it eerily looks very similar to how gravitational waves are represented. What do you guys think? Look up Spiral Portal in sky.
YES! THE WAVES HAVE BEEN DETECTED!
nice beat his prediction
I've been posting this story for a while, now. Is it possible they're related?
Time is fascinating. I worked the subway stations for nearly 10 years. From one end of the city to the other. Every so often I would notice the city would be saying that, "Today just flew by" or "The day was just dragging along." How can an entire city, with no interaction with each other until they used the subway, complain about the same time paradox unless it was effected by it? Maybe a time distorted bubble the earth passes through in its revolution around the sun. Maybe random waves of time distortion hitting the earth? Maybe they're given off by the sun. Maybe they're from outside our Terran system and reach us in intervals. ???? Ti-i-i-ime, is on my side. Yes, it is!
Today, 11th February 2016 - Human species detect gravitational waves for the first time..
Well, it's detection on Sept. 14 2015 officially announced on 11th Feb, 2016
Can anything be observed without energy exchange between the observer and the observed?
Gu Kwest shun !!
Why is the "w" so far from the other letters?
If you want to know more about gravitational waves, read the Contact Notes of Billy Meier.
How big was the difference in length between the mirrors?
Fractions of an atomic nucleus. A mind-boggling level of accuracy.
+Nicholas Hylton precision :)
+Nicholas Hylton Hmm Okey ... So the mirrors surface most be flatter then a fraction of an atomic nucleus for the test to have any meaning?
I never knew Scottie had a tedtalk
Science is amazing... :)
Today it is confirmed! Gravitational waves are officially detected! ( not even a physicist but what a big day for physic field!)
today is a good day
question: how does the gravitational waves deteriorate through space-time? is there a resistance present?
+Josh Dougall No there isnt, it is just because the effects act over a bigger area. Let me explain it with light waves:
Lets say you have a 100W puntual light source, and that its energy distributes equally in all directions. Now: One meter away, the light distributes over 4Pi square meters (because the area of a shell with radius r is 4 r^2 pi), so the light intensity PER SQUARE METER would be "100W/4pi" at 1 meter of distance to the source.
What happens now if find yourself at 10 meters of distance from the light source (lets call it bulp)? Then the power output of the bulp is still 100 W, but it distributes over a much bigger area. Now, the intensity per square meter would be "100w/(4Pi*100^2)."
So, as you've seen: The intensity per square meter is much less at 10m of distance to the bulp than at 1 meter of distance to the bulp, without any kind of resistance involved. Its just pure conservation of energy. The same thing goes for gravitational waves.
+Josh Dougall The amplitude decreases in inverse proportion to the distance from the source as the wave spreads out over a greater and greater volume of space. So if you move twice as far the amplitude is halved.
+Depressed Robot oh I see, that makes sense, thanks for sharing
Thanks, that is a good explanation. I have recently been trying to figure out how to do exactly what you explained, but I did not know this shell type math,...in a way I did, but I couldn't figure out how to do it at the first meter.
I am believing that you meant to say at 10 m that the intensity per square meter was equal to 100 W/(4Pi*100),....instead of 100 W/(4Pi*100^2). Because 10^2 = 100.
can the fabric be cut? and what's under the trampoline if we "drill" it?
+Jyotirmoy Mandal Its like a 3 dimensional trampoline so it cant be easily cut... But black holes are the closest thing to cutting the fabric and nobody knows what is in the center of those so maybe spacetime can rip :O
its so unsettling :)
Well if it bends and warps, it is physical of some sort. Gravity is a result of spacial density increasing. Just takes a black hole (sphere) to increase or distort it enough to see it.
Well all of this is now proven, it's amazing
What if gravity was a positive force echoing through the universe , and then the eclipse of this force by a large and solid object causes the observer to be pushed towards that object? And then clocks run faster at higher altitudes , because they are recieving more of this force , the excess of wich is energy , wich in turn deforms matter in a way that convinces our measurement tools that spacetime itself is curved.
I love he Scottish accent :)
its fields, toroidal fields, and inertia
Gravitation is all line frequencies and line divisions it holds all dimensional planets through its magnetic energy meteorically electric electronic systems
weightless floating magnetism flux lines forming a electromagnetic lock. making the invisible cause seemingly instant over distance. a constant connection is not really spooky.
"gravity waves" detected by this advance ligo lazer capacitance chamber are actually an effect known as electromagnectic phase rarefraction. nothing to do with space-time relativity. if you read the thesis on the ligo website there is alot of inconsistencies such as measurements found during engineer pahse and not testing phase i.e human interference. the binary blackholes collided 1.3 billion years ago and measured now. the results of measuring a small change in phase doesnt not constitue a "gravitational wave" its rarefraction
I still think that the gravitational impact base on attraction. Just attraction by mass. F.E. The blossom on the branch of a tree.
The blossom grows a little apple, with mass. The branch starts to bend. The mass of the apple grows, by attracting the food out of the tree by the umbilical cord between the apple and the branch. The branch bends more. The apple grows ripe, where at some time the umbilical cord becomes separated from the branch. The apple becomes attracted to the earth, grwoing a new tree.
Spacetime of the bending branch is the result of attraction. The apple can move by the wind, which also moves by attraction!
Gravitational waves. I do not see waves. I see there rising points up and down inside matter on the event horizon, which show themselves as waves because we want to see them as waves. That is observing science. By perceiving science, the points come up and down by bending space, as with the apple on the tree above.
How wide is a gravitational wave? Wouldn't a gravitational wave affect everything at the same time? Relativity would make a gravitational wave undetectable because everything would move at the same rate and there would be no relative motion. The mirrors would stay aligned even though they both moved. Js, .
No, the mirrors are art right angles, an L shape. A passing wave would distort one arm of the Lmore than the other. The difference between the two arms of the Lnis what they are detecting.
+Noah Spurrier So they know the geometry of gravitational waves? They can detect an ant sneezing if they use indirect methods to do so. They had to produce results and did.
+Noah Spurrier what was the difference in length?
+tor isaksson 4 kilometers
+tor isaksson difference in length was about 1/1000 of a proton! They do the experiment at two different locations, in order to make sure no other factors are affecting the difference in length. They figure out the difference in length by an interference pattern in the light, because the waves do not align if the distance is changed. It actually a very clever, but complicated to fully understand experiment.
Humans never set foot on the Moon. Rethink that 240,000 miles away. Amazing how everything works together. Bart Sibrel.
can we travel on this wave?
Even if we could they are slow (speed of sound) so it's void
@@Nukkro they travel at the speed of light, we would otherwise never be able to observe them in the first place
Found it
like Glasgow, hand me a pint
Am I the only one who really likes his accent?
Thank You. Was wondering about dates & how long it actually took them to detect and confirm their first gravitational wave. Not long at all. So happy for this as funding at least in USA almost demands immediate results.
78professor david bacon
and yes gravitation waves detected..
Gravity = Time. Time = Gravity
not quite
+Cyrusislikeawsome XD
no such thing as gravitational waves, good observation pittiful explanation.
+Floda Reltih You what? Do you live in a cave, or do you just choose to ignore the knowledge put forth to you?
no such thing as gravitational waves, good observation pittiful explanation.
/watch?v=J3Hoax81rkI
Is that a real nose?
world scirntific community is celebrating detection of g waves. congratulations.
In reference to this signal( gravitational wave) here is something to consider LIGO False positive, problem is that the methods used to interpret the noise (which has a smaller amplitude than the atomic nuclei) use predetermined template comparisons that introduce a bias in these observations. The signature of chirps that begins with a low and moves to a higher frequency may be due to many other natural phenomena. There is also a problem and that is, to associate the Signal (chirps) with cosmic events; There are three natural relationships: similarity, contiguity and cause and effect. Of these, the causes and effects it is the most problematic where the narrative does not have a connecting principle, but instead it is artificially juxtaposed by the mind and not real. In other words, how many of these events could be associated artificially and are not real. How many of these events occur in the Universe and are accidentally and wrongly associated. This is a problem that has not been answered beyond a shadow of a doubt.
Kinda wish he'd skipped the history of gravity part.
Why can't you detect the ambient gravity field. Its everywhere - I have detected it, and is quite simple.
Todd Grigsby how have you detected it?
One ten millionth of an atom? Scientists detecting answers to their wrong equations. Never heard a boffin explain a Singularity?
no such thing as gravity
please translate your content to Arabic
Everything is a wave these days. Next thing you know, love is actually a wave sync
Bullshit.
Nice presentation by Martin Hendry. However, Gravitational Waves are hypothetical and there is no direct evidence, yet, to validate their existence. You could point to the indirect evidence by Hulse and Taylor but that is not definitive proof! It's interesting to note that Nathan Rosen spent a considerable period of his academic career attempting to disprove Gravitational Waves. Einstein in the latter half of his career did a double reversal on Gravitational Waves. If they are out there then they are very difficult to detect and most probably will not be easy to utilise as a new generation of telescopes. Gravitational Wave research smacks a bit of BSM and Supersymmetry. It promises the "holy grail of answers" but it just might not deliver the final product!
measurements of the Hulse-Taylor binary system that suggests gravitational waves are more than mathematical anomalies. Various gravitational wave detectors exist and on 17 March 2014, astronomers at the Harvard-Smithsonian Center for Astrophysics claimed that they had detected and produced "the first direct image of gravitational waves across the primordial sky" within the cosmic microwave background, providing strong evidence for inflation and the Big Bang.[6][7][8][9][5] Peer review will be needed before there can be any scientific consensus about these new findings.[10][11] On 19 June 2014, lowered confidence in confirming the cosmic inflation findings was good
+James Cowley I assume you've heard about the announcement on Feb 11th?
+Star Trek Theory gravitational waves
We've found direct evidence now!
Star Trek Theory that sucks.It's probably on YT or something if you want to watch.
Gravitational waves BS