How do black holes destroy information and why is that a problem?

Рет қаралды 313,782

4 жыл бұрын

This video is to answer a question that many of you asked about my video on quantum gravity, which is just how do black holes destroy information and what's the problem with that.
To explain what is the problem, I first introduce the two major concepts in contemporary physics theories, which is the "state" of a system and the "evolution equation". I explain the difference between time-reversibility and time-reversal invariance, and that there are no fundamental evolution equations which are irreversible. The only fundamentally irreversible process we know of is the measurement in quantum mechanics.
Black hole evaporation, however, seems to be fundamentally irreversible, already before a measurement is being made. This is the very problem, because that makes black hole evaporation incompatible with quantum theory.
Support me on Patreon: / sabine

Пікірлер: 1 400

@DrFuzzyFace 4 жыл бұрын

Sabine Hossenfelder joins Sean Carroll and Brian Greene in becoming a great educator of physics. Where she distinguishes herself is her uncanny ability to take what are arguably abstruse subjects and concepts and explain them with unequalled clarity and economy. My hope is that countless others will discover her powerful and disciplined intellect and polished communication skills, thus allowing them to better understand our physical reality at a quantum level.

@mountainhobo 4 жыл бұрын

I would love to see Sabine and Sean discuss the Everett theory at length, knowing both's views on the subject. :)

@ismirschlecht4122 4 жыл бұрын

How about speaking about PSYCHIC reality in quantum level? Is not this level the one where the physical and the psychic, the objective and the subjective merge?

@ronaldderooij1774 4 жыл бұрын

@@ismirschlecht4122 No, sorry. The brain, and thus the psyche, although much of it is unknown, is known to be entirely classic, not quantum based.

@ismirschlecht4122 4 жыл бұрын

@@ronaldderooij1774 I suggest to make a distinction: The brain is just the (stupid :-)) hardware that runs the software called "mind" or "psyche". Without the OS "mind/psyche", the brain itself would be stupid like bread. When I assume that whenever we observe the "dance of quanta", subject and object merge together, I do not mean the brain, but our operating system "mind/psyche". With this observation / measurement, we can no longer reliably distinguish whether what we observe outside and/or within our OS takes place. I think that's one of the reasons for the Heisenberg uncertainty principle. Upps - gerade erst sehe ich, dass Du ja auch deutsch kommunizierst ... (Da hätte ich mir die manchmal merkwürdige Google-Übersetzung sparen können.)

@DrFuzzyFace 4 жыл бұрын

@@ismirschlecht4122 Ismir, the mind is what the brain does - the mind is an emergent property of brain activity, it does not exist independent of the brain (which is where Descartes made his regrettable mistake). QM applies only to the mechanical operations of the brain at the smallest of scales, it has nothing to do with the immaterial mind. Cheers.

@waynemcnab9496 4 жыл бұрын

I have listened to many teachers, and I have taught a great deal, although, not on this subject. You are a great teacher. Thank you!

@stationaryplane9149 4 жыл бұрын

A great deceiver to those who follow her. Most of who follow this unscientific nonsense lack the ability to think critically and just blindly follow this utter garbage because they can't use their own discernment to investigate tangible provable reality.

@gwddmt1 4 жыл бұрын

A physicist, writer, teacher and performer. Fantastic! Turn on the closed captions CC kzfaq.info/get/bejne/r8l4gaqftqu7ln0.html

@TheSimonScowl 4 жыл бұрын

I'm so glad she dispensed with the word 'information'. I've been looking for a clear explanation of that forever. It's like most physicists preferring to speak of baryon asymmetry. Why not just say the matter/antimatter puzzle? That way, even us rubes can understand what the hell they're talking about!

@TheSimonScowl 4 жыл бұрын

@Jan Petersson Or maybe you just lack the intellect to grasp these concepts. Most do... but most are humble enough to hold out on making asses of themselves. But NOT you and Stationary Plane. Oh no... you need to understand everything right now... or waaaaaaahhhhh!

@TheSimonScowl 4 жыл бұрын

@Jan Petersson Oh, and it took me less than 5 minutes link your link to Flat Earth Theory. Are you a flat Earther?

@katg-gk5ox 3 жыл бұрын

My eyes popped at 1:20 w/ the definition of time-reversible I hadn't heard of before. These are incredibly good presentations!

@aj2228 3 жыл бұрын

I don't think the definition of information is being able to discern a system at a prior time. That is the definition of useful information. But there is also information that is not useful. A more fundamental definition of information is, whether a system's information at time t is always 1 to 1 related to the system's information at time t+1, regardless of whether you could predict or reverse engineer it.

@goasthmago6354 2 жыл бұрын

past and future are non existent, quantum world proving space time as a frame in now, for real

@wolfgang757 4 жыл бұрын

"Information" is never at a loss when this scientist posts a video! Clear and well presented and I have never seen better on the topic.

@aaroncurtis8545 4 жыл бұрын

I recently discovered your channel. Good stuff content wise, and compliments to whoever is composing these shots and backgrounds.

@MaxBrix 4 жыл бұрын

I think Jan Peterson doesn't like the background and would prefer you believe in god. I'm with her on the background part. It kept moving like an optical illusion.

@theway5258 4 жыл бұрын

Hi Sabine! Thanks for your life time to teach us all. Your videos are great and clarify our mind and do the world better as i hope. Please keep working on it so we have the gift of knowledge to make things better together. ❤️

@JackClayton123 4 жыл бұрын

Just found this channel last week and have subscribed. Excellent presentation and explanations, enjoying all the episodes!

@kzeich 4 жыл бұрын

Thank you for not explaining these topics like we're idiots- for not dumbing them down like other educators tend to do- for acknowledging you're speaking to educated people with considerable interest in what you're presenting. Love the platform.

@motkceb1635 Жыл бұрын

Your compliment is a presupposition. You pre-suppose that everyone is educated watching this video you’re also pretty suppose that everyone is thinking like you. Yes, many people can digest and mentally process the way she teaches and explains but to me she does so and understandable elementary way, not in some advanced educational method.

@sphericalharmony1603 4 жыл бұрын

That was certainly the clearest explanation of this problem that I've ever heard. PS Sabine's book is well worth reading too.

@jbghumanjr 4 жыл бұрын

Wonderful exposition. And that pant suit... is everything!

@manoo422 4 жыл бұрын

@Pavor Specsavers I think...

@jbghumanjr 4 жыл бұрын

@Pavor Nah. Look closer. It's a pantsuit. (mind you what she's "saying" is far more relevant. But... was jus giving her some shine for the rad fashion.)

@manoo422 4 жыл бұрын

@Pavor You're an idiot.

@dougoverhoff7568 4 жыл бұрын

Irrelevant! It looks great on her, and that's all that matters.

@gowdsake7103 4 жыл бұрын

@Pavor Thinks you need glasses or education !

@emmanuel435 4 жыл бұрын

I've been looking for a KZfaq video since yesterday that could explain the Black Hole Information Paradox well and most of them are too technical for me. But this one is amazing. I've literally understood the basic concept of the problem. Nice explanation for starters like me. You've earned my subscription!

@anhi399 4 жыл бұрын

I've watched so many science education videos on KZfaq, and yours was the first to talk about either "State of the System" or "Evolution Equations". Describing those two elements first gave me the aha moment when you talked about how information can't be preserved. Thanks for the video, here's another sub!

@iandavidson1 4 жыл бұрын

Such a clear explanation of a difficult subject, such an itelligent person. Thank you.

@MrKyle700 4 жыл бұрын

Very clear, concise, to the point, easily understandable by a laymen. Thank u

@johncommers9597 3 жыл бұрын

Sabine, you are a pleasure to learn from, I must tell you I have been watching you for hours and I am grateful for your work.

@416dl 4 жыл бұрын

Some of this returns to me, having heard it before and having had, despite my background in fine arts, a good solid exposure to physics and cosmology while in college and by pursuing math and science for my own enlightenment despite sucking at math, like so many other artists...so thanks for restating it in such an eloquent and concise manner. Oh, and those backgrounds..my experience in the visual arts (video in particular) means I ordinarily find them visually cloying and over-used, but may I say the optics and aesthetics on your page are awesome; nothing distracting and yet not boring. My compliments to your production . Looking forward to more. Cheers.

@thefaboo 3 жыл бұрын

Thank you! I've heard about this paradox a lot over the years, but this is the first explanation that didn't leave me thinking, "okay, so what?"

@one-of-us9939 4 жыл бұрын

Many levels of brilliance. Thanks Sabine!😇

@Krunchy71 2 жыл бұрын

I just recently discovered your channel, and I am so amazed at your ability to explain things clearly. Thank you so much.

@warshipsdd-2142 3 жыл бұрын

On top of an outstanding presentation of information, your visual composition of the scene, visuals and the presenter an one of the most graphically pleasing I've seen. A long time ago I taught photography and media production--wish I had had this video as an example of both art and practice. Well done.

@mattmaloney5988 4 жыл бұрын

Science Explainer is exactly a superb title. Thank you.

@mountainhobo 4 жыл бұрын

Very clever thumbnail with "42" going up in smoke.

@DinarAndFriends 4 жыл бұрын

42 isn't the answer to anything.

@DinarAndFriends 4 жыл бұрын

Sabine was born in 1976. Do the maths.

@Q_QQ_Q 4 жыл бұрын

german humour without emotion .

@DinarAndFriends 4 жыл бұрын

@@Q_QQ_Q When you're 42 that number tends to stick in your mind.

@lyjj 4 жыл бұрын

420 blaze

@peterh.1521 4 жыл бұрын

Sabine gives us an easy-to-understand explanation of something that normally is difficult to understand, since black holes in space are invisible. Thank you for your illustrative videos!

@gearhead1302 4 жыл бұрын

Omg I finally get this now. Nobody has ever been able to explain it to me. THANK YOU! It seems so simple now.

@iinkshade 4 жыл бұрын

Thank you so much for explaining this. I actually thought I didn't understand information loss at all, but apparently I had a decent grasp of it. The real issue that I wasn't understanding was the "information" part. I suspected that in this sense, information is not the same as it is in everyday language, but I've never heard someone actually say that. I also didn't understand why it is sometimes referred to as a paradox. That word seems to have more of a connotation of something being impossible or contradictory, rather than just not being understood. A lot of physics seems to use names for things that just cause more confusion.

@averylawton5802 Жыл бұрын

I think the most beneficial quality of the way in which you explain physics in your videos is you understand the confusion that Layman would have with the terminology and explain it plainly without sounding condescending or demeaning you validate the normal person's difficulty wrapping their mind around such a complex subject that most people spend their lives dedicated to. It's not an easy feat and I have my hat off to you for it

@HannesRannes Жыл бұрын

Thank you for this video! I have seen many about this topic already and after every one I was wondering about why it is implicitely assumed in the video that the universe is injective/bijective (function analogy) and if it couldn't just be surjective (two different states just leading to the same later outcome). So glad you have addressed this. I'm already deep in your video archive and this channel has become one my very favorite science channels for a good reason.

@JoeyV115 4 жыл бұрын

great explanation! channel has a bunch of interesting topics about physics! love it

@michaellovejoy8751 4 жыл бұрын

Sabine is great! I feel like I actually understand this stuff!

@peterfitzpatrick7032 2 жыл бұрын

Feelings have no place in physics... 😉

@charleshultquist9233 4 жыл бұрын

Is the "screen" pattern in the background moving or is this an optical illusion?

@zpango2000 4 жыл бұрын

Simple, clear and pleasant. Thanks Sabine!

@alanmiddleton2473 3 жыл бұрын

Great delivery, major respect for Sabine and will continue to subscribe...

@kevalan1042 2 жыл бұрын

Very interesting. But could someone enlighten me about the following: if observation is not time-reversible (which happens all the time) 3:19, why are we bothered by black holes not being time-reversible?

@olinater5 11 ай бұрын

Yeah I was wondering this as well... If a star can explode and disappear just as easily as a black hole can disappear with only radiation being left behind, why is it only a problem with black holes?

@docholiday8029 4 жыл бұрын

The mark of a good teacher is the ability to take complex info and concepts and make them easy to understand. You are a great teacher. I would add that the discrepancies are due to foundational theories that are at best, half true. The truth is coming. It is far simpler and more elegant than the current mess.

@bosoerjadi2838 4 жыл бұрын

And to flaunt nice skin and good figure. :-p (Subscriptions have been booming since she started showing bare shoulders). But yes, she's extremely good at explaining physics.

@docholiday8029 4 жыл бұрын

@@bosoerjadi2838 Good point She is easy on the eyes.

@DinarAndFriends 4 жыл бұрын

But the mark of a good thinker is to question what he or she teaches first.

@docholiday8029 4 жыл бұрын

@@DinarAndFriends Excellent point. Already there. In fact, my issue isn't blind acceptance. It is the opposite. I am so used to people being half right or wrong that I tend to be hypercritical which is also out of balance.

@DinarAndFriends 4 жыл бұрын

@@docholiday8029 But you won't get any insights from somebody who can't think outside the box, however bright they are. I knew a guy at school whose supervisor at Cambridge said he was the most intelligent person he had ever tutored. But he couldn't question authority to save his life. He is still down the rabbit hole trying to make sense of gravity.

@Rasputin.Bogard 3 жыл бұрын

Thank you for your time, and love for teaching. I love listening to you and the topics you choose. 😊

@Epiphone1964 3 жыл бұрын

I'm a huge fan of your very digestible explanations. Cheers!

@Magister_Sibrandus 4 жыл бұрын

I understand things a little bit better now. Thanx

@DinarAndFriends 4 жыл бұрын

Modern physics is like watching CNN or Fox News. The more you watch, the less well informed you about the world.

@schmud68 4 жыл бұрын

@@DinarAndFriends reeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

@Stan_144 4 жыл бұрын

Great lecture. Sabine is emerging as one of the best physicists in the world.

@vhawk1951kl 2 жыл бұрын

How many soi-diant"physicists" are there in whatever you mean by " the world"? Have you compare the unfortunate Sabina with each and every single one of them and what were your criteria?

@Stan_144 2 жыл бұрын

@@vhawk1951kl You are right. It was just a hyperbole .. ;-)

@vhawk1951kl 2 жыл бұрын

@@Stan_144 Bless you for that, such candour is refreshing - I wish you well

@dogstick12 9 ай бұрын

Best KZfaqrs

@tim1883 4 жыл бұрын

If I had had you for a professor I may have stayed for the doctorate. These videos are an excellent way for an old physicist turned engineer to catch up on the stuff I have missed.

@KRGruner 4 жыл бұрын

Wow, incredibly clear explanation of a complicated subject. Well done.

@anubhav21dec 4 жыл бұрын

This is hands down the best explanation of BH Information problem out there.

@manoo422 4 жыл бұрын

Its the ONLY explanation I have ever seen.

@michaelsommers2356 4 жыл бұрын

PBS Space Time has done a good video on it: kzfaq.info/get/bejne/b76be6WeqpOyY2g.html

@ant7936 4 жыл бұрын

Love your monochrome set!

@CarissaWyles 3 жыл бұрын

I think you're my new favorite channel! So glad I found you :)

@Aufenthalt 4 жыл бұрын

Clear, coincise and professional as ever, good job.

@Serrrrrrrrrrrrrrr 4 жыл бұрын

That background is tripping my eyes out!

@erenkad7154 4 жыл бұрын

It behaves like one of those moving pictures if you were - allegedly - in stress

@jerrybrown1446 3 жыл бұрын

Whew! I thought I was tripping balls!

@Digalog 3 жыл бұрын

Ketamine style

@mitriesp1248 4 жыл бұрын

KZfaq algorithm rarley gives me the good stuff but im glad i got this

@dremaboy777 4 жыл бұрын

Dimitri Pehlivanidis The problem is, the algorithm is based on 'all' or internet activity - not just KZfaq. Not withstanding, is owned by Google. So... that damn A.I. sends crap based on 'everything' it knows about you. I'd assume purchases you make, are of higher priority than videos you watch. So... your KZfaq activity is only a part of its calculation of what it THINKS you want. Then there's that part of "what IT (they) want you to want". Algorithms within algorithms bro.

@russchadwell 4 жыл бұрын

These are very good presentations. Naturally, a very tough subject to basically handle as a so-called "talking head", but, wow! These presentations are done very well! Very interesting and highly, highly informative!

@jeffreyhulse5266 4 жыл бұрын

Love your explanations. You make things very clear. Thanks.

@alphamale3141 4 жыл бұрын

She makes me wish that I had studied physics instead of law after receiving my undergraduate degree in engineering. Love that first name - Sabine.

@markjgaletti57 4 жыл бұрын

If I Had One Last Wish in life it would be laying under the Stars Holding hands listening to Sabine

@texasnewt 3 жыл бұрын

What a romantic, but I guess you could do a lot worse!

@johnkeck 4 жыл бұрын

HI Sabine, thanks for laying out the relevant physics so clearly (as ever)! I was wondering if you could clarify a detail in the video. You say, "If you combine gravity with quantum theory, it seems you get a result that's inconsistent with the quantum theory you started from." Surely you mean it's inconsistent with the *time reversible part* of quantum theory (e.g., the Schrödinger equation). It's not inconsistent with the part of quantum theory that's not time-reversible (viz., the measurement process-is there even an equation for this?), right? Or am I missing something?

@robertkelly5025 Жыл бұрын

Thank you so much for this! I am an middle aged man that has been asking about this for decades but have never gotten a good answer. You, Don Lincoln, Arvin Ash and a few others make life make sense. And, of course, Richard Feynman.

@fortifiedmentality8067 4 жыл бұрын

Love that outfit.

@fortifiedmentality8067 3 жыл бұрын

@Roger Loquitur, this is by far one of the weirdest responses I've had on KZfaq.

@yt.personal.identification 3 жыл бұрын

@Roger Loquitur And here I was thinking it only requires basic observation skills to notice the main focus of a video we are watching.

@fortifiedmentality8067 3 жыл бұрын

@Roger Loquitur, so you're angry that I complimented her outfit and not the content of the video? Erm... I'm sorry?

@fortifiedmentality8067 3 жыл бұрын

@Roger Loquitur, well I'd think your insulting comments were evidence. It certainly seems like you're attacking me due to an emotional reaction to my comment. I don't know what being of the passive sex means. And I don't know what my gender has to do with it. You're not making much sense.

@fortifiedmentality8067 3 жыл бұрын

@Roger Loquitur, oh okay. If you want to make random insulting comments then pretend you didn't just to feel some sense of achievement and soothe your ego then so be it. People have insecurities and behave in weird ways because of them, this is just one example. Sorry me complimenting her outfit got you mad.

@Jehannum2000 4 жыл бұрын

We should be thankful that physics finally has a non-unitary aspect. Because sure as hell, there is an arrow of time. Irreversibility is not a problem; it's a boon.

@Josh23761 4 жыл бұрын

Best education into what is meant by 'information'. Finally found a channel that can inform on an intellectual level while still remaining digestible to people outside the scientific community.

@claytyler-nt4rt 2 жыл бұрын

Just about the finest, prettiest, most understandable physicist I could ever imagine. And, she doesn't dumb things down too much, (from a minimally math literate layperson's pov). Great photogenics and clarity in the service of physics literacy ... I'm ALL for it.

@R_Ultraloud 4 жыл бұрын

Inteligent and beautiful, perfect combination.

@jorge_781 3 жыл бұрын

And hot

@smguy7 3 жыл бұрын

An enchanting woman. Beauty and brains.

@addemn 2 жыл бұрын

They don’t let women who aren’t hot into physics. It’s actually very sad and hostile to women that she’s using her sexuality at work

@paulschrum4727 4 жыл бұрын

2:42, "mixing Doug". I think she might mean "mixing dough". Sabine, thanks for your wonderful videos, and I am not intending to make fun of you. But "dough" is rhymes with "slow".

@SabineHossenfelder 4 жыл бұрын

Sorry about that. It's not a topic I frequently talk about in English.

@vincentpinto1127 4 жыл бұрын

@@SabineHossenfelder No need to be sorry or even to have replied, to this type of comment. Just to keep it in mind for future use would be sufficient. We all understood what you meant. If Paul or I would have tried to speak in German, or another language that is not our native own, who knows how we might have mispronounced?

@paulschrum4727 4 жыл бұрын

@@SabineHossenfelder English spelling is so inconsistent, unlike, for instance, modern Turkish, which was designed by linguists. So I am sympathetic to people when they don't anticipate that through, though, slough, and cough rhyme with true, throw, cow, and off. It's like we set it up to trick people.

@paulschrum4727 4 жыл бұрын

And sometimes slough rhymes with cuff.

@Na-eo1gx 3 жыл бұрын

Sabine Hossenfelder no need to apologies; this is awesome; it sounds peculiar but also makes a lot of sense at the same time.

@lascurettes 3 жыл бұрын

I love your videos. Thank you. I could not do anything with the formulae you show, but you explain it well enough that I grok what you're explaining. I also love your ability to elegantly but firmly call "bs" on more fantastical theories with no way to be tested. Also, you're the best dressed scientist I've seen.

@davidwright8432 4 жыл бұрын

Very many thanks, Sabine. That final point, that 'info loss' just means you can't infer initial state from final (as different initial states result in same final), is a crucial clarification of what is close to an 'abuse of terminolology' in use of of the term 'information'.

@mdd1963 4 жыл бұрын

The dresses you wear for these lectures are quite nice, btw!

@Wrongald 4 жыл бұрын

I just learned something! ...or I think I did... For sixty years I've had the wrong idea about irreversibility... I hope I remember it tomorrow

@benjamindare5590 Жыл бұрын

I love your voice Sabine! It's so authoritative but also soothing.

@Nightcrawler333 4 жыл бұрын

Thanks for this clear explanation. I was really confused about Blackhole information loss, earlier

@mmattoso1 4 жыл бұрын

Her outfit is incredibly elegant!

@MisterWillow 3 жыл бұрын

While that is true, it also distracts me from focussing on her lesson. Reminds me of a German teacher I once had, but I better not get into details here. Sabine Hossenfelder: Stop dressing that way!

@cd-zw2tt 3 жыл бұрын

It looks like something they would wear on Star Trek: The Next Generation. Combined with the subject matter, it feels very futuristic.

@generrosity 3 жыл бұрын

@@MisterWillow wow, rude, if you are being distracted by clothing then the fix needs to be with you not her!

@bigmistqke 3 жыл бұрын

@@MisterWillow creepy

@MisterWillow 3 жыл бұрын

@@generrosity Erm... You seem to be a little oversensitive. I don't need a 'fix'. Hossenfelder is just looking sexy in that dress. Also, I wasn't in any way dissing Hossenfelder, I am a huge fan of her physics lessons/insights/etc. If you have a problem with that observation, ask yourself why *you* have such problems.

@videoformer 4 жыл бұрын

The perfect combination: An interessting lecture in a nice jumpsuit. ;-)

@ailblentyn 4 жыл бұрын

videoformer And filmed in Magneto's prison cell.

@THEOneAndOnlyDOCTORofHUMANICS Жыл бұрын

Sabine, It was hard to concentrate on your discussion about this topic because of what you were wearing, and also, the standing pose that you took during the entire video!?! Wow! I was already interested in these astrophysics and cosmological topics, but like the description of my own KZfaq Channel states, I must keep my own focus on the social-sciences as a priority instead!!! You just make it very hard...for me to focus on my own priorities!!! Sincerely, Your New Fan, Martin.

@robertbarta2793 4 жыл бұрын

What a concise train of thought. (And excellent english for an obvious non-native speaker.) Note to video editing: I found it a bit distracting when the speaker was moved left and right. Maybe keep that static half-left and have the inserts appear half-right?

@FarFromZero 4 жыл бұрын

Interesting combination. Physics served in a cute dinner outfit.

@ReligionsFakten 4 жыл бұрын

An old idea, but works anyway.

@FarFromZero 4 жыл бұрын

@@ReligionsFakten Nice nick. Go ahead^^

@rojaws1183 4 жыл бұрын

The newest X-man: Physics Woman.

@brettbrannon4775 4 жыл бұрын

Haha like black holes attract, I feel myself being attracted to her😜😜😜😜

@uturniaphobic 4 жыл бұрын

no information lost there

@joehinojosa8314 4 жыл бұрын

I TRIED to listen to this video but KEPT Looking at her!

@julkiewicz 4 жыл бұрын

Such a cliff-hanger with the other theories. Please continue vidoes about this topic!

@modolief 4 жыл бұрын

Superb content! Thanks; well articulated, clearly explained, and concise while still comprehensible (insofar as I comprehend this subject matter, which is strictly at the amateur enthusiast level, with a little mathematical maturity).

@discogodfather22 4 жыл бұрын

Do some physicists like T'Hooft and Susskind claim that information is retained on the surface of the black hole, therefore it has some kind of way of preserving that information? Something that has to do with holographic principle?

@SabineHossenfelder 4 жыл бұрын

Yes, that's one of the possible solutions. Working on a video about that as we speak, basically...

@DinarAndFriends 4 жыл бұрын

>>on the surface of the black hole As if you could preserve 'information' on the surface of something which doesn't exist and which wouldn't have a surface even if it did.

@DrDanasDiary 4 жыл бұрын

@@SabineHossenfelder Such a video would be great, where you go into more detail.I have never looked deeper into the research/literature regarding black holes, but I'm starting to get more and more curious.

@lennarthedlund9783 4 жыл бұрын

@@DinarAndFriends What makes you believe black holes don´t exist?

@DinarAndFriends 4 жыл бұрын

@@lennarthedlund9783 The lack of evidence for them and the fact that their existence is based on a theory which is obvious nonsense.

@douglassmith3016 4 жыл бұрын

*If we could see the singularity, we wouldn't be so OCD about black holes.* Humans do love a mystery, don't they?

@dremaboy777 4 жыл бұрын

Douglas Smith Nothing so fantastic about the bottom of a well. And when in the world will they stop calling them black holes! IT'S A STAR. Like coal, graphite, graphene, fullerene, diamond.... IT'S CARBON. The only "hole" is the gravitational well a black star creates in the fabric of space. And even THAT is not a hole; hence the singularity. Galaxies simply form when the well gets full and things that can't fit in anymore, are forced to rotate around the event horizon. where we can observe them on the surface (of the fabric). As soon as scientist can't SEE something... they get all ... technical.

@douglassmith3016 4 жыл бұрын

@@dremaboy777 I've been working on this theory: *Black Holes, Higgs boson, String theory, Super Conductors, and the like, have been inserted into our scientific culture (like a dangling carrot in front of a donkey) to keep us from discovering the truth.* It's very cool to spend billions on super-colliders, ITER, and Hubble. Really, it is. It's just that there are other things we could be doing with that money. Y'know what I mean?

@dremaboy777 4 жыл бұрын

Douglas Smith Agreed.

@soldtobediers 4 жыл бұрын

@@douglassmith3016 Damn Right Doug - More Cowbell, Right? How in the ''Cornbread Chiitty Ta Chaw Hell'' can we be trusted with that true knowledge by all of those collective Universe's together as a W-hole? If we can't take care thru ''Empathy'' all of what's wrong with us here on this Puny Human Earth? Forgive the Socractic/Christeo questioning Y'all. They just seem to leap out sometimes, as if from a priceless gift, which had already been paid. -82719

@dhoffheimerj 3 жыл бұрын

What a succinct and elegant explanation.

@alechorn1109 4 жыл бұрын

I have an undergraduate degree in physics from the 1960’s and then became a lawyer so I know just enough to appreciate how much I don’t know. I try to keep up over the years but fail greatly. This presenter is the best physics educator I have know. I always want to run away and tell everyone I meet what I just learned. Thank you.

@daffidavit 4 жыл бұрын

I'm with you Alec. I studied "Space Technology" at FIT in 1970 until the Apollo missions ended. Years later, I became a lawyer but I tried to retain the study of science in my heart. I agree with you, Dr. Hossenfelder is one of the few very good presenters of her expertise I've ever encountered.

@alechorn1109 4 жыл бұрын

daffidavit Ha! I worked at NASA as well. Worked closely on next to last moon shot and later on SMEAT the ground based long term space travel simulation. Loved science but loved law as well.

@daffidavit 4 жыл бұрын

@@alechorn1109 Well, As a N.J. Bar member as well as members of Fl, PA., and N.Y, anytime you are thinking of taking a multi day seminar, please let me know. It would be a pleasure to meet with you. I usually attend the NJ Meadowlands and the Atlantic City NJAJ three day conferences each held one time in the spring and fall. If ever you are in the NYC area, I'd be glad to be your host and introduce you to the largest local civil Bar association in the U.S. That would be the New Jersey Association for Justice. Just call the N.J. Bar Association and seek my username. You will be able to find me from there. Be well brother.

@stewiegriffin6503 4 жыл бұрын

I watch this videos, although I don't understand 99% of it.

@daveseddon5227 4 жыл бұрын

I must be so much better than you because I don't understand 100% of it.

@notmni 3 жыл бұрын

then why u waste time ; - ;

@deckiedeckie 4 жыл бұрын

The sexiest thing in the planet.....is an intelligent woman!!

@donniedorko3336 2 жыл бұрын

Thank you for your continued clarity

@billwehrmacher3842 3 жыл бұрын

Let me begin by saying that I love your channel. It explains concepts in a way that I can almost understand. That said, I need to ask what difference does it make in the grand scheme of things whether we know whether or not there's an answer to this and so many other questions. Will my life be any different knowing if "information is lost," or there are Higgs bozons, or what time is or isn't? Apart from giving grad students subjects on which to write theses and earn them a career so they can put food on their tables, what does the planet gain? SH suggested there's little reason to build the next bigger collider. I didn't see the need for the last one. Keep bringing us more equally curious videos. Perhaps one of them could address my query. :-)

@wulphstein 4 жыл бұрын

If you burn a piece and then try to reassemble it, it's not time reversal, it's reconstitution.

@cidfacetious3722 4 жыл бұрын

Off topic I just wanna say you are WEARING that outfit

@canudeiro Жыл бұрын

Concisely and clearly explained ! Thank you !

@elnauta9525 4 жыл бұрын

Thanks Sabine. Very well explained for people like me!

@jockedredd1329 4 жыл бұрын

My brain is far too mediocre for this. I think I'll watch some "funny fail compilation" instead 😢

@brettbrannon4775 4 жыл бұрын

Just if only our instructors looked and dressed this attractively🥰 I believe we all would have passed😜😜😜

@FromBajor 4 жыл бұрын

Found this treasure, nothing on KZfaq matches this, the best online series to follow, Netflix you have been beaten.

@sabeshbala1933 3 жыл бұрын

Ohh Sabine..you are talking my mind to an other level.👍

@davidrhudgins 4 жыл бұрын

She’s also smoking hot!

@varunnrao3276 3 жыл бұрын

I really don't get what's the big deal. Information irreversibility, as you did show, happens in all quantum measurements. So wut??

@Rafaga777 4 жыл бұрын

Great and concise explanation making a elusive topic like black hole physics a little bit more understandable for the average layman...

@davidwilson2266 4 жыл бұрын

your delivery of information is unmatched.

@heaven4247 3 жыл бұрын

That's it I'm hot for teacher. Need Sun Glasses For sure 😽

@johnsummers1333 4 жыл бұрын

My goodness what a wonderful dress you have.

@chuckphilpot7756 4 жыл бұрын

Yeah that isn't a dress. What is so hard to see about that, smdh.

@DJandBiskit Жыл бұрын

T his is my favorite channel. I look fwd to exlporing the rest of the backlog.

@mikepayne2581 3 жыл бұрын

Love your videos, great work.

@razvandragoi10 4 жыл бұрын

that dress, the way those white lines flow onto your body making the future predictible, dat tatu on your back make me believe in black holes

@FREE_WILL_DEFENDER 4 жыл бұрын

My question is why is she wearing that sexy ass outfit. Im not complaining at all tho

@saldownik 4 жыл бұрын

Well, it isn't over the top. She just grabs a little bit of attention with her physique.

@FREE_WILL_DEFENDER 4 жыл бұрын

@@saldownik i didnt say it was over the top

@kennethhicks2113 4 жыл бұрын

Simply a tool in her toolbox to help her educate and grow the channel. She's clearly not stupid.

@360MegaBits 4 жыл бұрын

Subscribed. Your videos are informative, and the subject matter is explained well. One request: some light instrumental music in the background might add to the overall presentation.