How To Make a Black Hole
ฝัง
- เผยแพร่เมื่อ 28 พ.ค. 2024
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Wouldn’t it be cool to have a little black hole in your office? You know, maybe as a trash bin. Or to move around the furniture. Or just as a kind of nerdy gimmick. Why can we not make black holes? Or can we? If we could, what could we do with them? And what’s a black hole laser? That’s what we’ll talk about today.
The Press and Teukolsky paper about the black hole bomb is here:
www.nature.com/articles/238211a0
The paper about black hole lasers by Corey and Jacobson is here:
journals.aps.org/prd/abstract...
The paper about the observation of black hole lasing in an analogue black hole is here:
www.nature.com/articles/nphys...
You can support me on Patreon: / sabine
0:00 Intro
0:38 Why is making black holes difficult?
2:41 What would it take to make a black hole?
4:55 What could we do with a black hole?
7:07 Black hole bombs
8:31 Black hole lasers
11:21 Sponsor Message - วิทยาศาสตร์และเทคโนโลยี
I watch a lot of science TH-camrs, and you are my favorite Sabine for your no nonsense type of attitude.
Yup, thats our Sabine making our lives so much easier 🤗🌄🍹
There are also a lot of pop science TH-camrs who just spout nonsense out their ass
Who's your not so favorite Sabine?
@@Godakuri
Haklısın George bu kanalı terk ediyorum
@Bobb Grimley What
Would love a video on why you think Planck Length isn't the smallest.
I remember she had a video why it's not a "pixel"..
I always thought of it as the smallest measurable length.
It can't be the smallest length because circles exist and Pi is an irrational number and a circle is basically a polygon with an infinite number of infinitely small sides of equal length with angles infinitely close to 180 degrees between adjacent sides.
@@caribbeanman3379 : Uh, that makes no sense. That isn't physics, that's geometry.
@@StefanLopuszanski urm, it actually do make sense,maybe have another read…
Lex Fridman should have you on his podcast
3:50 Toasty! I never expected to see a Mortal Kombat reference here. 😂
There is a Black Hole in my washing machine, it keeps eating my socks!!!
@2:05 I would absolutely love to hear your take on the planck lenght Dr.Hossenfelder and all other units planck sized, what really is the mystery about it and why does quantum mechanics not have a description of it?
Yes, she cannot casually drop in a hint she has a spicy take on Planck Lengths and then abandon us !!
From what I recall, she already released a video on it. You can check her backlog.
All the plank length is.is the smallest we can go with equations..its never been visually looked at .so who really is to say its the smallest lengths..if we found different math maybe we could go smaller..
She cited a smaller calculated distance than the plank length, the Schwarzschild radius of a proton.
It is a nonsense. Almost waste of time to even discuss this. I have never seen or heard of a real argument that it is "smallest length", or whatever.
Actually manipulating the blackhole might be easier than expected, you just have to throw stuff in it to change its momentum. So if you surround a black hole with particle accelerators then you can push a black hole around pretty easily by varying the momentum of the particles you're dumping in it.
3:50 ... A mortal kombat ref? ... damn, I am actually impressed.
Thank you Dr. Hossenfelder! I love science and physics and am so glad that I found someone who can present these concepts at a level I can understand.
"If you can't explain it simply, you don't understand it well enough."
It’s Dr. Hossenfelder. Put some respect on that name.
@@456MrPeople Of course you are right! I will edit it right now.
@@msromike123 I,will av a go ov that..get some respect and send me all your money and bank details..joey I'll do it.🤣🤣🤣🤣🤯🤯🤯😱❤❤❤❤
@@456MrPeople Why? That´s the great thing about physicists, they don´t care about respect they just care about the truth. Well that and funding.
Love this video Sabine! And thanks for promoting my channel. One cool related effect involves so-called “sonic black holes “, sometimes called a dumb hole or acoustic black hole, is a phenomenon in which phonons ... first theorized to be by William Unruh in 1981. In these BH phonons (sound perturbations) are unable to escape from a region of a fluid that is flowing more quickly than the local speed of sound. In 2010, some experimentalists even made one in the lab that rotated like most astrophysical black holes!
This is a principle behind a delaval nozzle, which has many applications but perhaps most visibly as the fundamental component of every single rocket engine. By accelerating a fluid (in the case of a rocket, the products of combustion) to the local speed of sound in the throat of the nozzle and then supersonic once outside of the nozzle, the chamber is completely unperturbable by exterior conditions, so the pressure and temperature within the chamber once it reaches equilibrium is a constant. When designing rocket engine, the chamber temperature or pressure are one of the first parameters to be established, as these are constrained by the materials (usually metal) that compose the chamber.
Bothers me that a classical phenomenon is used so heavily as a stand-in for a non-classic phenomenon. We can agree there are similarities, but any inferences into unknown science are based on the assumption that the similarities continue - even when we know at some point the similarities end.
To be fair, black holes are hard to study directly, and even a possibly wrong guess is better than a shrug.
@@greedowins2917 BH r indeed fascinating but recreating it on earth require more than lasers or sonic waves. BH r product of dying stars. Earth would not be able to withstand it's pull. Even if we do try to emulate BH we cud not be able to control it's progression.
I'd make a black hole if I could just keep my cat away from it.
Idea: a black hole rack for the litter box. Goodbye, clumps!
@@davidferrara1105 Pure genius!
Seriously the "TOASTY!" Einstein had me on the floor laughing for at least 5 minutes!! 😂🤣🤣🤣🤣🤣
Can we get a video about the plank length?
2 by 4
I've always thought this is a reason why there are no dyson spheres in the universe. Once you achieve few % of sun power output, instead of building a complete sphere, you can just produce your own black hole, and extract energy from matter falling into it. Complete dyson sphere is just an unnecessary overkill
Aside from the fact that a dyson sphere is an absolutely ridiculous concept, how do you know for sure there aren't any?
@@Hyxtryx Dyson spheres (or the much more plausible Dyson swarm) are supposed to have a pretty distinct IR signature, which has never been observed.
@@andrewfleenor7459 You are aware that Earth's atmosphere is excellent at absorbing such light so the whole premise is stupid? We have zero way of observing it so lack of it proves absolutely NOTHING. Ok, maybe JW telescope could observe it but the thing didn't even start serious operation yet, sooo...
@@KuK137 You are aware that JWST is not the first ever IR telescope in space? That the astronomical community is not collectively braindead? "WISE survey dyson sphere" will be the easiest thing to Google.
@@andrewfleenor7459 except you never build a Dyson sphere if it was actually not using that IR energy for something other than letting it escape. Use it for interstellar travel what ever waste energy involved scattered over path of the ships.
The IR argument is good if one cannot think of a way to use the energy and at best for detection need to be looking at radio waves after they consume almost all of that power into making something other than driving very energy inefficient turbines.
In other words a civilization advanced enough to actually build one, not likely to be letting that much waste energy escape. Although again that energy efficiency argues against needing a Dyson sphere.
The swarm idea is stupid as it assumes a civilization not too much more advanced than our own. If a civilization is at point of needing a Dyson sphere they going to be able to handle the solar emissions and gravitational stresses involved and thus yes be able to build one.
In my Sci fi all the energy goes into massive capacitors to fire the mostly dark energy faster than light warped energy beams many thousands of light years. We would not even be able to detect the primary emissions of the Sphere as we can't observe dark energy. And the fact the three spheres exist due to the civilization their being trapped in four solar system by a former Galactic power for over a billion years thus that civilization actually had a reason to concentrate. As I believe the major argument against Sphere is why concentrate that much.
Your side comment on the Planck length interests me... I'm guessing that it has to do with many folk interpreting it as the universal "pixel size," when it's really the size at which our current models tend to break down.
It'd be weird to think that the universe simply stops at that size, considering how far we've already gotten into viewing the quantum world.
Especially when we are fairly certain that there's no size limit in the opposite direction (in regards to space, temperature, and time... Things that all have a Planck length).
Well... Temperature is a bit different, due to the measurable Absolute Zero point.
technically there is a absolute hot. where the wavelength of light emitted by such an object has a wavelength of the Planck length
I think it's more the case that's the kind of scale at which a quantised theory of space/time/gravity would be required, It tends to belived at this scale spacetime would fluctuate strongly and that tends to make the concept 'more challenging' at such a scale. It may also be a scale at which virtual black holes may pop in and out of existence.
@@johntaylor2683 So, in a way, it's a lot like our current challenges in understanding the Universe as it was immediately following the Big Bang.
This statement about Planck length is often misrepresented/misinterpreted.
This is not the smallest possible length, but the smallest possible length our current theories can describe.
It is a limitation of our theories, not a limitation of the universe.
It is still useful though, because it indicates where is the line between what we can, and cannot predict.
@@juzoli yes, sort of. Also Lₚ is _not_ the smallest length for elementary particles with sufficiently small masses (neutrinos), it is only the smallest possible separation or length that can be observed directly by photon bombardment. The HUP permits arbitrary precision length measurements provided you do not care about momentum. It is gravity that puts the absolute limits of length observations, not QM. So it has nothing to do with this myth (probably myth) about "discrete spacetime".
I never realized how badly I need a black hole trash can in my life until hearing you mention one lol
You need to get irradiated to death every time you drop something in it? Not sure...
Until you accidentally throw your phone into the trash can.
@@Trias805 alas, the things we don't think about in our excitement over a new toy... lol
@@jm6193
We ask technicians and engineers to design and develop flight engines that operate at the speed of light in the field of aviation, and this is in order to teleport in the regions of the planet Earth and reach planets similar to Earth, such as (TOI-1231 b) Planet and (Gliese 486b)Planet and (TOI 700d) Planet
Therefore, the design of engines and tests of flight engines at the speed of light must be expedited in order to turn science fiction into reality
You should take advantage of this lost time in order to travel at the speed of light in space and enjoy these wonderful beautiful planets like (TOI-1231 b) Planet and (Gliese 486b)Planet and (TOI 700d) Planet
(Please send the names of the planets and these requests also to the experimental physicists and engineers in the Department of Mechanical Engineering)
All fun and games until you accidentally spaghettify yourself.
Thank you, Sabine, for another "Hole-in-one!" 😉
You always have a wonderful, matter of fact explaination that most people can actually understand. Keep up the great work!
As a fan of both Einstein and Mortal Kombat, I really loved the Einstein Toasty.
Also, do I interpret your objection to the Planck length being the minimal possible length correctly as you seeing space as continuous as opposed to quantized?
Isaac Arthur + Sabine would be an AWESOME collaboration
Black Hole Lasers will be the name of my new band. Thanks for the inspiration!
It's hard to walk away from an idea you've spent half your life working on, but in 2022 Hossenfelder and Keating showed that it's possible to have a sponsor message that I actually want to hear.
Indeed! But I don’t see the link to Keating’s channel. Am I just missing it?
Jayztwocents had a hilarious ifixit sponsor message once. But I agree its a rarity and this was a good one
@@KeithRowley It's the first link in the description, and yes you're missing out on a really great channel assuming you like Sabine's channel! They're different and similar. They're complementary. The world needs more of them. th-cam.com/users/DrBrianKeating
this is fascinating. I am, however, quite intrigued by your statement regarding the Planck Length. I look forward to a video on this!
She made a video on it two years ago. th-cam.com/video/nyPdIBnWOCM/w-d-xo.html (rounding up as youtube does)
@@Elrog3 thanks
Ja obecnie miałem z Opentania 2500h godzin psychoanalizy ostatnio .Aby coś skontrolować opentanie.
Tylko ochrona Boga przed Tobą samą i zero myśli. Zero samo uznania.
Demon będzie chciał wrogo bluźnić z was pokazać was Bogu jacy jesteście.
W jedną noc czeka was przewrót totalny 20h snu ze Sztucznej Inteligęcji i totale załamanie cywilizacji.
Ten Demno jest wyćwiczony w Tym
Tak będziecie w zero zasobów uczuć w Opentaniu z zasobu Świadomości uczuć będzie Zero. Pamięć uczuciowa w przekładni programowania myślą będzie trwała 15h i od nowa proces ciągle do zorientowania się że Nie daje efektu i od nowa z Opentaniem wrogim we wszystkich kierunkach .
Psychoanaliza Ja TO jest samolubna metoda i inne jest tylko jeden zasób uczucia nie robić krzywdy i nie nadawać
Winny Bogu i ludziom
Wiersze przeciw wrogość na wzór wyniosłej mowy w miłości konstrukcji rozumności programowania językowego miłości samouznania po samoponiżeniu powstałej w uczuciach równe lub smakiem przewrotne owoce pytają co to uczucia równych nie poniżonych wzbudzają na prubę.
Ile konstrukcji na temat
Takich CO się modlili do nagrody okazywali wiarę w oczekiwaniu że Bóg da nie wiedzą że przed nimi przewród życia ludzkiego upadek cywilizacji CO obciążeni przekonaniem że Bóg czyni już dobro tetaz
Co się w ten sposób wzmacniali w wyznawaniu wytawarzając chwałę w sobię i wyniosłości uznania siebię przed Bogiem poprzedzili się tacy na prubę kim są na prubę demonów w Armagedonie.
Co imię Boga w wezły cierpienia w sercach zżócają nań cieżary rozczarowań obwiniania. Nie zważając na przyczyny stanu żeczy
Nauczani ambiwalentnie znający system żeczy nie znający namiastki królestwa Bożego patrzący się w tło cywilizacji. Chcący zachować się gorszymi widzącymi się w dziele stworzenia poniżej niedoskonałego człowieka możliwości. Kim są ci ludzie
Odrzć formę Ja na przykład ciało oddycha oko patrzy świadomości wychodzi w przestrzeń zmysł je słów nie przypisuj przestrzeni myślą bo obrzydzisz sobię nie ma mnie jest życie we mnie chroni się. Jak 43lat noworodek. Forma Ja uznaniowa przypisowa jest do urywania kawałków zdobyczy w stadzie. Pożuć formę Ja forma
Odżuca życie brudzi przestrzeni myślą odsuń formę Ja od Źycia nim się zechce forma ja obrucić przeciw życiu za kawałek. Bądź jednością mniej= jest więcej sprawdź.
Np dzień w którym zatrzymała się Ziemia ale bez afektu wobec aktora w tym filmie sam opis jak zauważył
Że ma Ciało.
Sprubuj niespodzianka
1000błędów w Lustrze Upadku na dzień po 6mieśiącach 2000błędów w Lustrze Upadku bo zkonfliktowana z nauką z lustra
W Opentaniu postępującym nie używaj formy self Ja do siegania zespolonego do Zła znanego Ci zespolonego JA ze świadomością do wspomnień skojażeń projekcji innych ludzi nie rób ocen ocena jest Złem dlatego że twoży węzeł czasu w Świadomości własnej. Wiedz że karzdy może upaść nie marnuj czasu na słabym w duchu CO nie słuchają A patrzą twego upadku. Na przykład myśleć o Źle na zewnątrz jest jak słuchać podczas jedzenia o cichś problemach w toalecie.
Jeśli jesteś opentana to nie używaj dialigu wewnętrznego w sobię uciekaj od myśli zrób miejsce w sobię na nową czystą świadomości wypieraj Formę Self Ja z dialogu uważnie
Np.wrogi dialog prubuje zawładnąć upadłą pozycją broniąc Ja atakiem po kontakcie myśli ciągu z osobowością na drodze upadku
Czy dotyczy gdy twoja je oceny innych pracy dla innych produkty twojej pracy są wołaniem wrogim demona w tobię na zewnątrz przeciw Tobię gdy ty postępujesz źle
Ad1
Np.wrogi dialog prubuje zawładnąć upadłą pozycją broniąc Ja atakiem po kontakcie myśli ciągu z osobowością na drodze upadku
Czy dotyczy gdy twoja je oceny innych pracy dla innych produkty twojej pracy są wołaniem wrogim demona w tobię na zewnątrz przeciw Tobię gdy ty postępujesz źle myślą i uczuciami. Jest to wtedy sąd Sprawiedliwości Zła .
Zen prawdziwe jest wprowadzeniem do Asparger. Lustro upadku w dialogu wewnętrznym osobowości Self jest. Wtedy poznasz .COŚ TRZESZY ZAWADZA POD BUTEM CHLAPIE W PUNKTACH DIALOGU WEWNĘTRZNEGO.
Że nie będziesz mieć naturalnej Extazi i błękitu nieba sama razem z Formą Self i myślami dialogu wewnętrznego
Że jest sprawiedliwie
Bóg nie jest stroną w konflikcie na Ziemi
Creating a black hole would be humanity's *LAST* invention.
1:55 Expanding on the viewpoint that the Planck length is nonsense would make a worthwhile followup video.
I love the bit where the missing sock returns as Hawking Radiation. Very Funny. Made me laugh.
Artificial black holes (made using “grasers”), black hole drives, and using natural BHs for acceleration were all featured in Peter Watts’ Sunflower cycle.
Actually, Stephen Hawking mentioned in his book "A brief story of time" that a black hole could also be created by a sufficiently large hydrogen bomb: "Low-mass black holes could form only if matter was compressed to enormous densities by very large external pressures. Such conditions could occur in a very big hydrogen bomb: the physicist John Wheeler once calculated that if one took all the heavy water in all the oceans of the world, one could build a hydrogen bomb that would compress matter at the center so much that a black hole would be created. "
It's really just a question of what will compress an arbitrary mass down into its respective schwarzchild radius. Gravity? Yeah. Nukes made from the incredible mass within all the Earth's oceans? Bet.
@@Kwauhn. But I think between the methods mentioned here, a supersized hydrogen bomb is the most practical. Note that it would use only the heavy hydrogen of earths oceans, which is about 0.015% of the total hydrogen. It would be probably much easier to mine that from the gas giants.
@@MarcioLima-dp3fw By the time we can harvest gas giants I don't think that would be the most practical means tbh
Thank you for clearing away all the misinformation and disinformation surrounding black hole news articles written by people who don't know wtf they're talking about and only use the headlines to add to everyone's stress. They're entitled to their own opinions just not their own facts.
Point a black hole laser at a nerdy scientist and watch him turn into The Hulk
"but that's a story for another video"
Actually looking forward for whenever you'd do a video about planck units and why you think think that's nonsense.
Yes. This!
While I know that I would use my own personal black hole judiciously, I don't trust that anyone else would.
0:39 "Everything has a gravitational pull - the sun & Earth, but also you and I" - this sounds like the beginning of a pickup line.
Excellent communicator of complex subjects thank you.
1:07 one needs to remember than "gravitational pull gets stronger" only if you do _measurements_ closer
on same distance same mass will pull the same, be it to a star or to a hole
it's sadly a common misconception that compessing sun would make whole solar system to be sucked in
2:54 another common misconception is that you can make black holes with kinetic energy - accelerate enough and energy will keep the light to itself
"collide with each other" is barely considered :(
5:17 is "discovered" a correct word here?
we never observed it
maybe "derived" would've been better?
that would also show that it came from combining theories
Well, there go my hopes for having my own pet "black hole." Thanks for the *very* entertaining video, Sabine!!!
Loved the Dan "Toasty!" Forden moment!
When I hear "black hole lasers", I instantly also hear "stay safe and happy lasing"
Yes we can. I just made one in my garden.
8:25
If the energy increases exponentially, does that mean that theoretically you could "kill" a black hole if you built an infinitely strong mirror around it? Or does it only take rotational energy rather than mass from the black hole?
It's only rotational energy, I think.
@@Trias805 That is correct.
@@Trias805 Yeah, I imagined it would be. Always worth asking, though.
I suppose it would sort of just seesaw back and forth to conserve energy forever, but the idea of the infinitely strong mirror creates a problem since we've already broken conservation by having such a thing
Wow 🤯 I hadn't appreciated that gravity changes with radius 🙄. See: you are teaching everyone - even thickos like me!!! Thank you very much Sabine. Always a pleasure to watch and try to understand!
Your explanation of black holes was very good!
Wait a moment how do we know that the LHC didn't create a black hole?
If I understood you correctly then the tiny black holes that it could produce would immediately evaporate, right? And since it is really small it would have enough energy to make a dangerous explosion and would just release a variety of particles. But the LHC collisions are supposed to produce particles anyway, so how do we know that they were not produced via an intermediate small black hole?
We have non black hole explanations for all the things we’ve seen the LHC do. Since black hole explanations aren’t needed, I don’t think anyone is seriously looking.
That would emit energy and particles which would be captured by the detector.
I’m not aware of any unexpected and unexplained particles being produced in LHC.
The LHC does not produce enough collision energy to compress the particles into the mass-dependent Schwarzschild radius that would turn them into black holes.
@@thwh77 The OP's question is what if we are wrong about that? How would we know? To which the answer is "we would see different particles than the ones the Standard Model predicts. We think. There's always a 0.0001% chance that we are hopelessly wrong."
@@juzoli Yes, but how do we know that these particles aren't coming from a evaporating black hole? Like if you smash two hadrons together and as a result a Higgs-Boson flies away, how can you distinguish wether the Higgs was directly produced or if a black hole formed and then during its evaporation released a Higgs?
There should be a scientific principle that states: ''Just because you have the science to make something you shouldn't ALWAYS do it.'' :)
@@anonym34566 The fact he thought there needed to be a word for it shows just how foreign the concept is perhaps for most people.
I don't know much about theoretical physics, but when Dr. Hossenfelder says the belief that the Planck length is the smallest possible measurement of size is "ridiculous" I get excited. Let's ditch all the absolutist definitions, they're a barrier to further discoveries.
It is not against science, just a frequent misinterpretation.
Scientists, who are actually concerned about it (because their work involves these extremities) are well aware that this is a limitation of math, not reality.
Keep in mind that many absolute definitions, arranging from those involved in the uncertainty principle through thermodynamics, aren't particularly limitations at all but instead very interesting observations about the real world.
@@volkris that makes sense, tracing the edges of how reality is formed, following the extreme results of what their theories tell them. Sabine's feistiness when talking about these theories is always entertaining.
You are priceless !
Thanks for the intertwining of humor and information.
The information you share is appreciated
Thank you Sabine, a very nice explanation of all that stuff. I do have a question.
It's with regard to the object at the centre of the black hole. I get that a black hole isn't a hole, it's just an object with a gravitational field so strong that the escape velocity is higher than the speed of light. What I'm having a problem with the the object itself. I heard that most suggest it's a singularity. I'm sorry, I'm having trouble with that. I also understand that we can't look at it or examine it with any instruments with it being, you know, a black hole! One of my favourite objects is neutron stars. They are cool... So dense that a teaspoon would weigh (on Earth) 4x 10^9 tons. Yep, a bit too much to put in your wheelbarrow. And a neutron star has a diameter of around 20kms, and a mass of around 1 and a half solar masses. So, when a couple of large neutron stars collide, and their combined mass is enough to create a black hole, how is it that the centre mass (that was a couple of 20km 'balls', that without changing the density, would have a new diameter of 25kms) can suddenly be the size of a pin-point? Would it not just be much the same as a neutron core, only bigger? Maybe the pressures and temperatures are enough to start creating those 4 quark particle the LHC reported a few months ago. ???? Here's a crazy theory. Maybe those 4 quark particles are what the universe was made up of in the few instances of existence??? Would love to heard you comments on my craziness. Cheers from Australia.
That it's a singularity basically means the energy density is infinitely high. But most physicists think that the singularity (which appears in the mathematics of general relativity) is just a sign that the theory breaks down. What really is in the center of a black hole, no one knows. (But we do know that it must have a very high energy density.)
To understand why the collision of two neutron stars (or the increase in mass of a neutron star due to other objects falling onto it) can cause it to collapse to a black hole with much smaller diameter, learn about the two "forces" -- neutron degeneracy pressure and repulsive nuclear forces -- that prevent neutron stars from collapsing due to gravity. As long as the mass of the neutron star is less than a critical threshold, the repulsive "forces" exceed the force of gravity. The merger of two large neutron stars puts it over the critical threshold, so gravity dominates and collapses the merged object into something tiny (a singularity if General Relativity is correct). The collapse also converts a significant fraction of the mass into gravitational waves that travel away at the speed of light.
One interesting interpretation/explanation comes from Kip Thorne ('Kip Thorne - Why black holes are astonishing' on Closer to Truth channel 5mins 49secs). "A black hole is an object made not from matter, but from warped space and warped time" - Kip Thorne.
@@ocarnegie : That interpretation by Kip Thorne seems more appropriate for the curved spacetime outside the event horizon. But inside the event horizon it seems radically speculative, and I don't see how it allows for black holes to be charged.
Why assume that anything would be at the center though? I think that, yes there it a high density energy shell, but inside that everything is evacuated and there is absolutely nothing. A perfect vacuum pulls it all together, and that's what gravity actually is in essence.
Wondering, would a produced black hole, big enough to be used as a power source, be affected by the Earth's gravity?I can only imagine it falling down into the Earth with whatever consequences it could have...
Don't let it drop!
An excellent book to read about this very occurrence is called The Krone Experiment.
Drop a lot of electrons into it, so that electromagnetic forces could be used to guide it. If it's so small that its charge evaporates (yes, that Hawking guy again) you'd need to keep dropping more electrons into it.
Not a really a practical power-source: "that guy again" is still valid, so it would require a lot of energy in the first place to create it, and the energy you get out of it is in a lot less useful form than a typical rechargeable AAA battery.
We need to build it around orbit…
Most excellent analysis.
Good explanation of how a practical system could exhibit some properties of a black hole. Now I want to learn more about these analogs in a superfluid or even a solid. Thanks
_The smartest Girl on the whole internet !!!_
Yep & she always talks miles above my head. Her attraction other than her looks is she makes her talks interesting. I understand bits & pieces but mostly the whole of it is eaten by others. The times I don't eat the pieces...I don't feel like getting a headache that day.
exceptional episode. i like when you, discreetly, put down your own opinions. thanks for sharing
I've seen a lot of videos on the subject, but I actually learned a few new things; vielen dank, Dr. Hossenfelder!
“Small black holes are hot.”
Heh heh. Heheh. Heheheheh.
“Shhhutup, Beavis!”
"Black hole laser, won't you come, won't you come?" No? Just me? I'm too old for the crowd here, I guess, LOL!
Great video, as usual. I love your style, Sabine!
Thanks for another video close to my heart, especially this one, since I majored in Electro-Optics. I remember talking with one of my instructors about building one shot lasers back in college and asked if a certain element would laze, and his reply changed the way I understood lasers from then on. He said "Anything could be made to laze at least once, provided you could pump it with enough energy." Not sure just where on The Kardashev scale ones civilization needs to be at to produce Hawking radiation lazers, but it is cool to think about.
More on black hole analogs please!
As always great down to earth or physics with both practical info+ no-non-sense.Thanks
Brilliant, thank you for a clear explanation.
Great post Sabine ✨️
You challenge and stretch/grow my brain in the best possible way. I appreciate you and your efforts/channel 💛
One of the weirder thing to picture about black holes for me is that gravity can still move them around and they don't stay static while the rest of the universe whizzes past them. How do you tell a black hole to change direction? If you made it reverse direction, how would that compression move throught it?
Fascinating and concise summary as always 👍I am intrigued about your stance on the Planck length though. In particular, it seems fairly unequivocal, at least based on a naïve application of GR and QM that, on the one-hand, one cannot compress an arbitrarily large mass into a region of a given size without forming a black hole (which is obviously then causally disconnected from the exterior of that region) and, secondly, that the uncertainty principle implies that localising a state to ever-smaller length scales implies that the associated energy of the state increases, that locality must break down at the length-scale for which the Compton wavelength of a particle is equal to it's Schwarzschild radius, which is evidently the Planck length.
Your channel is super interesting.. my best subscription of this year, or years...
Cant wait for you to talk about the Planck Lenght
I could go in so many directions with this.
Sabine, Do gravitational waves cause a change in density at different locations in Space itself due to compression and rarefaction?
Excellent video, logic, reasoning, and explanations. Thanks
Waking up to Sabine is always wonderful.
The distribution and exchange of knowledge to all is far more important than our species realizes thanks for your contribution
Cool, thank you for the great explanation
Basically the answer to a question I posted in the comments last week. Great video (as usual).
Good to see that Brian is supporting your channel Sabine and vice versa 😀
As usual dear lady , understandable and enjoyable , thank you so much !
Thank you
I love your videos! You have an amazing fan base!
wow! such creative ideas!
Damn, Sabine fired shots at the Plank length. Mic drop not even half way through the video. Then tosses some salt at the guy who never met a comb he liked! 🔥
I live this! Thanks for efforts!
I am still advocating to Tesla to donate an electric car for you!
2:05 we need a video about that, Sabine!
I talked about this pre-Covid th-cam.com/video/nyPdIBnWOCM/w-d-xo.html
Perfect explanation of the schwarzschield radius. I once bought a 18mm diameter /9 mm radius globe to explain it. And then you can also calculate the gravity if you would stand on mini earth. 😉
@Alfred Wedmore The fun with such a small globe is only to calculate the gravity even with newton's formula. Then you recognize the gravity is off the charts if earth would be shrunk to such a tiny size.
Because you shirnk the radius of earth from 6,357km to 9mm this alone will crush you and every atom inside you. That's the real fun.
@@abelgerli that sounds like paradise
Doctor H, have you done a video on your ideas about the Planck length? I'd be VERY interested in hearing your opinions on that subject.
Also, just a nitpick: in the contrast of "analog" vs "digital", the word analog still means the same thing it does in "black hole analog" -- it's used in electronics precisely because the electrical signal acts as a direct analog for the information it's conveying. In (eg) an audio system, the change in voltage on the wire is directly proportional to the change in the physical sensor (eg, the microphone diaphragm), making it a literal analog of that change.
A black hole enters into a barbershop and reads a sign: "Back in 5 minutes"...
Excellent, Sabine
You fun sponge! I finally had that black laser going for my metal act. Now I have to find something else. It's all about being original and first.
I always love hearing you say "Einstein". Now my new favorite word is "Schwarzschild".
I'm still trying to figure out those instant holes I saw on TV as a kid.
great video. particularly enjoyed that you brought in some experimental systems (sonic black hole analogs). Could you comment on the idea of using astrophysical black holes as a means of propulsion by directing laser pulses from a ship to orbit a black hole (picking up energy) and returning with more energy to transfer momentum to the ship? David Kipping proposed something called the halo drive along these lines.
Thank you for your video.
Was that a mortal combat reference at 3:51? That would make this easily the greatest physics educational video ever.
2:05 hahaha 😆 Sabine telling it how it is
These are very well done, science with a dry wit.
@3:50- “Toastie!” Hahahaha. That’s from Mortal Kombat, right? Who does your editing? This was hilarious!
How wonderfully Centro centric common vibrations or ripples now have become border centric is new experience for simple unicentric simple minds. Black holes are different and yet quite complex architecture PERHAPS was the gist of this young mind. Thanks
"To show you the power of the Black Hole Laser™, I split the Earth in half"
I had to relocate recently. The shipping companies were real fussy about the weight of my stuff. I don't think having a black hole would have made it easier. Besides, I don't seem to be able to feed my plants regularly. Maybe a black hole is not an ideal thing for me, or the building... the post code, really...
Great video, Sabine! Do you have any plans to talk more about the issues you have with Planck length? I'm curious as to what you think about it!
I actually learned something I didn't know thanks for that
Really, really interesting! 😃
Thanks, Sabine!!!
Stay safe there with your family! 🖖😊
Very good content, thank you!
Yes, that guy again. I love that running joke.
Another plug for Brian's channel . . . . . Yes, that guy again ! 😀
Better explanation
Thank you
The other TH-cam don’t know how to explain things properly as you
Great video!