Meta-Materials: Invisibility Cloaks, Superlenses, And Earthquake Protection

Ғылым және технология

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Metamaterials are the next technological stage “after” materials. It’s a research area that has progressed incredibly quickly in the past decade, and that includes superlenses, invisibility cloaks, earthquake protection, and also chocolate. Yes, chocolate. What are metamaterials, and what are they good for? That’s what we’ll talk about today.
The 2000 PRL from Pendry is here
journals.aps.org/prl/abstract...
Aaron Danner's raytracing paper is here:
citeseerx.ist.psu.edu/viewdoc...
The paper from Lee et al about the first superlens is this:
link.springer.com/article/10....
The paper about the hyperlens is here:
www.nature.com/articles/s4159...
The infrared invisibility cloak that hides the mouse is here:
onlinelibrary.wiley.com/doi/e...
The video from Hyperstealth Corp is here:
• Hyperstealth Invisibil...
The paper about magnetic metamaterials to improve wireless power transfer is here:
www.nature.com/articles/srep0...
The paper about the acoustic directional reflector is this:
journals.aps.org/prmaterials/...
The paper for hiding from ultrasound underwater is here:
arxiv.org/abs/1009.3310
The paper about the acoustic invisibility cloak is this:
www.nature.com/articles/nmat3901
The two papers about earthquake protection are those:
ieeexplore.ieee.org/document/...
www.frontiersin.org/articles/...
And the paper about meta-chocolate is here:
pubs.rsc.org/en/content/artic...
00:00 What are Metamaterials?
01:38 Negative Refraction and Superlenses
08:24 Invisibility Shields
11:58 Phononic Crystals
14:00 Earthquake Protection
16:25 Meta-Chocolate
17:12 Sponsor Message
#science #technology #metamaterials
💌 Sign up for my weekly science newsletter. It's free! ➜ sabinehossenfelder.com/newsle...
👉 Support me on Patreon ➜ / sabine
📖 My new book "Existential Physics" is now on sale ➜ existentialphysics.com/
🔗 Join this channel to get access to perks ➜
/ @sabinehossenfelder
Many thanks to Jordi Busqué for helping with this video jordibusque.com/

Пікірлер: 869

  • @xenphoton5833
    @xenphoton5833 Жыл бұрын

    When you wrapped the foam around your face and suggested it as a way to "drastically improve your experience of the world". I can always count on you making me smile at least once throughout your videos. 👍 Thank you!

  • @drmemento

    @drmemento

    Жыл бұрын

    More subtle, the holes in the foam reminding her of cheese - as many things seem to do!

  • @Patrik6920

    @Patrik6920

    Жыл бұрын

    Ive tested it, it dramaticly Increases the experience of some youtube videos

  • @kasroa

    @kasroa

    Жыл бұрын

    I believe this is the only known way to avoid news about the Royal family at the moment

  • @cHAOs9

    @cHAOs9

    Жыл бұрын

    Its even better if you can just get everyone else to wear one

  • @auldteuchter9012

    @auldteuchter9012

    Жыл бұрын

    @@kasroa Why, what's happened....?

  • @zooblestyx
    @zooblestyx Жыл бұрын

    Not many people know this, but Sabine's sense of humour is actually made from a cutting-edge hyper-hydrophobic metamaterial.

  • @michaelmeredith912

    @michaelmeredith912

    Жыл бұрын

    Lol 😆

  • @bongobrandy6297

    @bongobrandy6297

    Жыл бұрын

    A Bond martini, stirred.

  • @precursors

    @precursors

    Жыл бұрын

    Her sense of humor is also oleophobic.

  • @RogerBarraud

    @RogerBarraud

    Жыл бұрын

    A rabid sense of humour?

  • @bkparque

    @bkparque

    Жыл бұрын

    I believe it

  • @johnregan2882
    @johnregan2882 Жыл бұрын

    Sabine, Thank you for providing "humor in science" along with the education.

  • @not_elm0

    @not_elm0

    Жыл бұрын

    So true!

  • @donquixoteupinhere
    @donquixoteupinhere Жыл бұрын

    You are one of my favourite science communicators, full stop! No nonsense, serious business… with a sprinkle of joviality. Thank you Sabine, you rock! 🎉

  • @stefflo712

    @stefflo712

    9 ай бұрын

    Apart from that one video where she talks about how capitalism is good :D

  • @lbgstzockt8493
    @lbgstzockt8493 Жыл бұрын

    I've only recently discovered your channel, but the way you combine interesting science with a great way of talking makes me really happy.

  • @sweebos
    @sweebos Жыл бұрын

    I literally just finished the videos on wireless power and 5g, where Sabine asks if we wanted to know more about meta-materials, and thought to myself, "yes please." This video was just in time. 😄 Thanks for sharing all this knowledge, it's greatly appreciated. ✌️💙

  • @scoreprinceton

    @scoreprinceton

    Жыл бұрын

    How soon will we have a video on meta-non-materials?

  • @garcoleuphrates4734

    @garcoleuphrates4734

    Жыл бұрын

    @@scoreprinceton It accompanied

  • @scoreprinceton

    @scoreprinceton

    Жыл бұрын

    @@garcoleuphrates4734 No wonder I missed it!!

  • @grayaj23
    @grayaj23 Жыл бұрын

    Thank you... I have tried to explain to friends where the word "metaphysics" came from, but they don't believe me. They want to believe it means something like "better than physics" or "more important" or "transcendent over". My undergrad metaphysics prof thought this idea was funny and treated the truth like an inside joke. What it means is "the book that came after we compiled the book on physics", because there wasn't a more formal name for the topic yet. I once had a cat that had a litter of seven kittens. One of them ended up named "the other cat", or O.C. for short, just because we didn't know she existed until a few hours after the first six were born.

  • @csmac3144a

    @csmac3144a

    Жыл бұрын

    This is an incredibly naive and impoverished understanding of what we mean by metaphysics. It is shocking how many otherwise intelligent people are afflicted with a sort of cognitive scotoma with respect to categories such as the metaphysical. Naïve positivism at this stage of human intellectual development is an embarrassment, like the time Hawking committed 12 or so basic logical fallacies in the first few pages of one of his books.

  • @grayaj23

    @grayaj23

    Жыл бұрын

    @@csmac3144a The idea of metaphysics and the nature of existence is generally too esoteric for people outside of the interested communities to want to spend much time thinking about. It's naive, but that's all it *could* be, because people are people.

  • @briangarrow448
    @briangarrow448 Жыл бұрын

    I’m still waiting for the invisibility cloak I ordered from an advertisement at the back of a comic book in June of 1968. Perhaps it will come in the same delivery as my Sea Monkey order.

  • @ryo0o0o88
    @ryo0o0o88 Жыл бұрын

    I love Sabine, her cute German sense of humor, her intelligence is up there with all the great minds, and her ability to entertain while teaching is so refreshing to watch;

  • @kb5zuy
    @kb5zuy Жыл бұрын

    ".. it's not what a fish is supposed to do." Love it. Thank you.

  • @birgerjohansson8010
    @birgerjohansson8010 Жыл бұрын

    An important application: I read that a metamaterial 'Lens ' for ultrasound could make ultrasound check images four times sharper, for the benefit of expectant mothers worrying about the fetus.

  • @collin4555

    @collin4555

    Жыл бұрын

    I imagine it would also make ultrasounds more useful for other diagnostic purposes as well. On several occasions I've been given an ultrasound which detects some mass is present, but can't get any clearer detail and needs additional imaging. So it'd be even more good news all around

  • @ElDJReturn
    @ElDJReturn Жыл бұрын

    I love your humor. Well timed and also very informative and insightful knowledge in between. I'm so glad I found your channel. Thank you for making science not only accessible but also entertaining.

  • @rickseiden1
    @rickseiden1 Жыл бұрын

    Dr. Hossenfelder, if you ever decide to give up on physics, I really think you'd have a great career as a stand up comic. You're very funny, and your ultra serious delivery makes it so much funnier!

  • @mikecope806

    @mikecope806

    Жыл бұрын

    German humor is no laughing matter!

  • @timesathousand
    @timesathousand Жыл бұрын

    I love Sabine's deadpan, snarky interjections.

  • @-_-president-_-richardson-9705
    @-_-president-_-richardson-9705 Жыл бұрын

    Hello Sabine.Your videos really helped me during certain tough times in my life and one of your notifications saved me from suicide.Thank you.

  • @-_-president-_-richardson-9705

    @-_-president-_-richardson-9705

    Жыл бұрын

    @Arbane's Sword of Agility Your god and your religion are the things that made me depressed twice during childhood and I don't need them anymore.(Btw the notification thing was 6 months ago,I am doing a lot better now)

  • @SabineHossenfelder

    @SabineHossenfelder

    Жыл бұрын

    I'm sorry about your difficulties. I understand the situation well. Please take good care of yourself.

  • @-_-president-_-richardson-9705

    @-_-president-_-richardson-9705

    Жыл бұрын

    @@SabineHossenfelder Thank you.I will

  • @-_-president-_-richardson-9705

    @-_-president-_-richardson-9705

    Жыл бұрын

    @Arbane's Sword of Agility Orthodox christianity,gnosticism and new age religions.Tried all of them during my early childhood years and they didn't help me at all.

  • @-_-president-_-richardson-9705

    @-_-president-_-richardson-9705

    Жыл бұрын

    @Arbane's Sword of Agility I have.Things are slowly getting better for me.I still have social anxiety,body dysmorphia and rumination but it has been better than usual.

  • @Kram1032
    @Kram1032 Жыл бұрын

    Would it be possible to use an accoustic invisibility cloak to significantly reduce the sound of ships' motors without impacting the ships' ability to travel? Because honestly that does sound like something incredibly useful: Since sounds travel far farther in water than in air, noisy ships have become a huge problem to marine life. (I suspect it'd also be useful for covert military application, but honestly, if it's possible at all, it should kinda be a standard feature of boats in the future. This sound pollution is a rather big deal) In fact, "hiding from dolphins" is exactly what this would be for: Whale songs have changed to far higher pitched just to be able to hear each other over the constant drone of large ships.

  • @punditgi
    @punditgi Жыл бұрын

    Very interesting! Thanks for the video. And your comment about frequent zooming in KZread videos is spot on. Those folks should be fined for each instance. Also, you make a very fine Egyptian hieroglyph, Frau Doktor! 😃

  • @MrWildbill
    @MrWildbill Жыл бұрын

    That was a really great intro to Meta-Materials, perfect balance of digestible information and humor. It will be interesting to see what we get when and if some entrepreneur gets their eureka moment.

  • @stellarshriner
    @stellarshriner Жыл бұрын

    My favorite Saturday morning class and teacher. I love the knee slappers. 'uhh yucka yucka yucka' Thanks Sabine

  • @rickkearn7100
    @rickkearn7100 Жыл бұрын

    Our host "walked like an Egyptian"! This subject post was so well presented (and satisfying) that when I finished watching it, my brain lit a cigarette...

  • @c_b5060

    @c_b5060

    Жыл бұрын

    Well said.

  • @jamielondon6436
    @jamielondon6436 Жыл бұрын

    12:15 I cannot even put into words how satisfying it is that there actually is a reference to cheese in the video! :-) Kudos, Dr. Hossenfelder, well done!

  • @AlienScientist
    @AlienScientist Жыл бұрын

    Look up Edgar Fouche - Former Area 51 Employee who talked about metamaterials and invisibility research back in 1998. That's where I first learned about Metamaterials back in 2004... I have been researching them ever since!

  • @rayoflight62
    @rayoflight62 Жыл бұрын

    Metaphysics is, for all practical purposes, a branch of philosophy. The study of metamaterials must therefore be the quest for the material a philosopher stone is built from. A similar material with a negative refractive index was referred in a paper from Isaac Asimov, the thiotimoline. Thiotimoline had a negative solubility time...

  • @ldbarthel

    @ldbarthel

    Жыл бұрын

    Ah yes, "The Endochronic Properties of Resublimated Thiotimoline". After creating endochronic polymers, it became possible to use the endochronicity to counter the effects of relativistic time dilation in space flight. (Yes, THAT guy again.) cf "Thiotimoline to the Stars".

  • @Blowfeld20k

    @Blowfeld20k

    Жыл бұрын

    @@kensho123456 You do get that they are mostly just referencing a trope from a scifi book, don't you ?

  • @Blowfeld20k

    @Blowfeld20k

    Жыл бұрын

    @@kensho123456 No problems, but I strongly advise trying some book scifi, it usually takes interesting science concepts much more seriously than the likes of Star Trek and Star Wars.

  • @virginie_fabrice
    @virginie_fabrice Жыл бұрын

    hi sabine i was a school collapse teen once but each time i watch your videos i feel like i was successful in my studies thanks for that and bravo for your work

  • @virginie_fabrice

    @virginie_fabrice

    Жыл бұрын

    your videos are my prize sabine thanks

  • @naughtyrobutt
    @naughtyrobutt Жыл бұрын

    Best sense of scientific humor online

  • @lukedowneslukedownes5900
    @lukedowneslukedownes5900 Жыл бұрын

    I just came from your newest video. I must say I’m so excited for the future of meta material

  • @dannypope1860
    @dannypope1860 Жыл бұрын

    ❤️ you Sabine! Never lose your sense of humor!

  • @nicholascurran1734
    @nicholascurran1734 Жыл бұрын

    I always enjoy your videos, the topics are typically interesting and well presented.

  • @Teh-Penguin
    @Teh-Penguin Жыл бұрын

    I cannot express how much I love the dry humour in these.

  • @JohnSmith-ju1gi
    @JohnSmith-ju1gi Жыл бұрын

    I love your videos and your sense of humor. I especially like that I believe that some folks don't even know when you are being funny. I watch and smile and enjoy that the world has people like you.

  • @lanekarabani8084
    @lanekarabani8084 Жыл бұрын

    LOVE you pr approach to humour in science. You’re perfect omg

  • @davidfalgout7304
    @davidfalgout7304 Жыл бұрын

    I could listen to you explain the world around us for hundreds of years!

  • @Vatsek
    @Vatsek Жыл бұрын

    A selfie camera permanently attached to one's face. What a brilliant idea.

  • @flatworm00
    @flatworm00 Жыл бұрын

    A really cool presentation...there is so much going on in this world that we don't understand, it is fun to get a quick glimpse

  • @theophrastus3.056
    @theophrastus3.056 Жыл бұрын

    I always look forward to Sabine’s take on things.

  • @hp127
    @hp127 Жыл бұрын

    What an interesting theme. Thanks for the introduction.

  • @smb10011001
    @smb10011001 Жыл бұрын

    Sabine's dry humor never fails to tickle. Thank you!

  • @TheMemesofDestruction
    @TheMemesofDestruction Жыл бұрын

    8:38 - The subtle Trolling is beautiful. ^.^

  • @GururajBN
    @GururajBN Жыл бұрын

    New material science for the engineers to master. This was something I had never heard of. Many thanks for imparting this new bit of knowledge.

  • @nacoran
    @nacoran Жыл бұрын

    You had me at meta-chocolate! I've always had an idea for a large sculpture (not a sculptor, just an idea I have) where the sculpture is ringed by a series of transparent pillars with various angles of refraction across their surfaces. It would allow the figure to face you from different directions- sort of a more complex version of the Mona Lisa eyes, and then to appear different when you go inside the circle of pillars. (Some of the techniques from sculptures that only line up into an image from one direction might be involved too).

  • @Ninth_Penumbra
    @Ninth_Penumbra Жыл бұрын

    The metamaterial I'm most familiar with is a type of paint which absorbs virtually all of the light which impacts it. It does this by redirecting incoming light waves into a labyrinth of nanostructures, with the result of being close to the blackest black possible (96% absorption). It's actually really bizarre to see in action, as any object painted with it becomes an abyssal silhouette that lacks any defining features other than the outline.

  • @r0cketplumber

    @r0cketplumber

    Жыл бұрын

    Nighthawkinlight demonstrates a metamaterial with the exact opposite effect- extremely high reflectivity in visible light combined with high emissivity in IR. kzread.info/dash/bejne/gGeWrNCEnci0erw.html

  • @symbolspangaea
    @symbolspangaea Жыл бұрын

    Thank you so much for this beautiful video! Really eye opening !

  • @nixdorfbrazil
    @nixdorfbrazil Жыл бұрын

    Love you! Keep it going, Thanks for your amazing perspective! I also like the script was written, so praise the writers. And the editing.

  • @justinahole336
    @justinahole336 Жыл бұрын

    Now I have "Walk Like An Egyptian" stuck in my head!

  • @pumbaa667
    @pumbaa667 Жыл бұрын

    Damn, there is so much jokes in this episode that this channel will soon become a comedy channel :D Lovin' it Sabine, keep it up.

  • @nowzarybijan7956
    @nowzarybijan7956 Жыл бұрын

    Grossartige Fähigkeit bei Sabine : Great ability to make science accessible to people ! That’s really wonderful ! Toll

  • @BRUXXUS
    @BRUXXUS Жыл бұрын

    How can I get into a research study about the meta-chocolate?

  • @dogcarman

    @dogcarman

    Жыл бұрын

    Asking an important question here. 👍

  • @sarahrosen4985

    @sarahrosen4985

    Жыл бұрын

    I am willing to be a test subject.

  • @helmutzollner5496
    @helmutzollner5496 Жыл бұрын

    Excellent video. Thank you for sharing!

  • @UncleSmokey
    @UncleSmokey Жыл бұрын

    Love this video. Thank you Sabine! This was very informative 👏. Earthquakes wow!

  • @darenmccormick2115
    @darenmccormick2115 Жыл бұрын

    "well that does away with selfie-sticks” Lmao 🤣🤣 Your brand of humor is pure gold

  • @Cre8tvMG
    @Cre8tvMG4 ай бұрын

    I appreciate your nerdy humor, along with solid scientific information. Keep having fun. Science is wonderful fun, not just serious business.

  • @geckel2145
    @geckel2145 Жыл бұрын

    Danke Sabine, your videos are always great!

  • @Descriptor413
    @Descriptor413 Жыл бұрын

    This is definitely in the personal horn tooting category, but in my Master's degree, I studied the use of microwave frequency metamaterials for use as strain sensors. Basically, metamaterial sheets (here called Frequency Selective Surfaces) act like notch filters at a certain RF frequencies, allowing certain frequencies of EM radiation through and reflecting others back, kinda like a colander. The trick of it is that the frequencies where this happens is dependant on the size of the metallic elements that make up the metamaterial. Because the frequency response is dependant on geometry, if you stretch the material, the resonant frequency shifts. We used this as a fancy strain gauge, which could be useful, since you can embed it deep within an opaque object, and then determine strains occurring at that point by simply interrogating it with an external electromagnetic wave and seeing what frequencies come back. That being said, the applications are still somewhat limited, but it's an interesting use. It also suggests that metamaterials are weak against strain, and thus if they are deformed, it could cause a shift in its behavior, so something to look out for that I don't hear talked about too much.

  • @MTerrance
    @MTerrance Жыл бұрын

    Okay - you got me. "It also ruins your makeup" hilarious. Your on-liners are killing me.

  • @whatsapp-.3481

    @whatsapp-.3481

    Жыл бұрын

    🔝🔝Tell Max immediately, for financial life changing business investment/something new Profitable..📈🔝

  • @phy6geniuxYTcreations
    @phy6geniuxYTcreations Жыл бұрын

    This is my current field of research, electromagnetic metamaterials. Thank you!

  • @s.vidhyardhsingh3881
    @s.vidhyardhsingh3881 Жыл бұрын

    Your humour is rare if not one of a kind 😂😁👍🏻 This video is amazing!!! A lot learnt ..

  • @0neIntangible
    @0neIntangible Жыл бұрын

    I foresee and anticipate the meta-material development of composite alloys for fabricating wave channeling envelope skins of high speed vehicles/aircraft/submersibles/projectiles to drastically reduce friction with the air or water, reducing the heating effects while allowing increasing the rates of speeds through the medium, and possible stealth characteristics.

  • @whatsapp-.3481

    @whatsapp-.3481

    Жыл бұрын

    Appreciate your feedback It's a great pleasure hearing from you. Stay tuned for more videos,for participating our online investment Community⬆️reach out the number above

  • @bazpearce9993
    @bazpearce9993 Жыл бұрын

    Brings new meaning to the phrase "A trick of the light."

  • @teashea1
    @teashea1 Жыл бұрын

    Your humor is so excellent..........................

  • @capitalistdingo
    @capitalistdingo Жыл бұрын

    I could be mistaken (and maybe I just missed it in the video because I was multitasking) but I think there may be more types of meta-materials than these. The changes in the materials can be more than just structural. Adding different materials in regular intervals can creat something with properties that a regular alloys or composites don’t have and these properties can be things much different than adapting the way waves propagate through the substance. I imagine that using elements with mechanical abilities that we could change on command or which change in response to certain conditions could allow all sorts of applications beyond my ability to predict.

  • @SabineHossenfelder

    @SabineHossenfelder

    Жыл бұрын

    Yes, sorry, didn't mean to imply that those are the only possible meta-materials. Those are the ones on which there has been the most research.

  • @josephgdangelo9807
    @josephgdangelo9807 Жыл бұрын

    The only way to obtain invisibility its to make sure none of the light reflects back to the observer. But in that case you would see black. So there's 2 parts to it. Stopping an object from reflecting while also allowing the background to be reflected to the observer... not so easy.

  • @4draven418
    @4draven418 Жыл бұрын

    Thank you for an interesting video. Lot of progress being made in this and related areas, very difficult to keep up with it all.

  • @D3GamesOficial
    @D3GamesOficial Жыл бұрын

    I loved the lens mini class

  • @KeithCooper-Albuquerque
    @KeithCooper-Albuquerque Жыл бұрын

    Great video, Sabine! It will take me a little time to reflect on it though ...

  • @alcyone1349
    @alcyone1349 Жыл бұрын

    Well, this video is so well done that even I, a layman, understood it. Thanks Sabine!

  • @llamallama1509
    @llamallama1509 Жыл бұрын

    Could superlenses be used in microchip manufacturing to photographically etch even smaller chip features than currently possible?

  • @SabineHossenfelder

    @SabineHossenfelder

    Жыл бұрын

    Interesting question. The wavelengths for which superlenses have been manufactured so far don't lend themselves for this purpose. The ones I have read about were all below the visible range. However, it's possible that I have missed something, and in any case, I can't think of any reason why it shouldn't be possible.

  • @hzdvb

    @hzdvb

    Жыл бұрын

    In principle, yes, but it seems unlikely that it would work. Currently, we use EUV light at 13.5 nm for lithography. The problem with EUV is that pretty much everything is absorbant in this wavelength region. Therefore lithography optics in EUV don't use lenses but rely solely on parabolic mirrors to focus and redirect light, and even that becomes difficult. The superlens would need to transmit a sufficient amount of light and not be damaged by the intense EUV radiation, which doesn't seem likely.

  • @JanBruunAndersen

    @JanBruunAndersen

    Жыл бұрын

    I was about to ask the same question.

  • @kylebowles9820

    @kylebowles9820

    Жыл бұрын

    @@hzdvb usually the photonic metamaterials I read about use the electrons in conductors to interact with the light. The resulting interface having different properties than the bulk material, hence metamaterial. I don't know much about resilience to EUV, but it really comes down to the conductor efficiency; making the ultra tiny structures able to handle the energy. In EUV research they use gold; but in an industrial setting it would probably be prohibitively expensive.

  • @peca87bg

    @peca87bg

    Жыл бұрын

    @@SabineHossenfelder speaking about interesting properties of meta materials. Some researchers focus on mechanical response such as negative Poisson’s ratio. But, did you know that an fcc single crystal has negative Poisson’s ratio when pulled along [110] direction? The thing is that for some interesting mechanical response we don’t need to build metamaterials.

  • @XmarkedSpot
    @XmarkedSpot Жыл бұрын

    This was a particularly delightful episode, I can't adequately express my gratitude for the #meta joys you bring

  • @edreusser4741
    @edreusser4741 Жыл бұрын

    I love you Sabine! And I love listening to your videos. Even the old ones.

  • @whatsapp-.3481

    @whatsapp-.3481

    Жыл бұрын

    🔝🔝-ᴄᴏɴᴛᴀᴄᴛ ᴍᴀx ᴛʜᴏᴍᴘsᴏɴ ᴅɪʀᴇᴄᴛʟʏ ғᴏʀ ᴀ ʙᴜsɪɴᴇss ғɪɴᴀɴᴄɪᴀʟ ɪɴᴠᴇsᴛᴍᴇɴᴛ☝️☝️**

  • @BigZebraCom
    @BigZebraCom Жыл бұрын

    I was going to create some meta-materials--but then things got really busy at work.

  • @dimension2788
    @dimension2788 Жыл бұрын

    Nice job on meta materials its a massive subject and Sabine did a super job on super lenses. Pendry has some very interesting lectures on this and his sense of humor is meta funny. I highly recommend the ISS lectures with Pendry what a brilliant scientist!

  • @Lord0fTheCheese
    @Lord0fTheCheese Жыл бұрын

    thanks for another entertaining and educational video.

  • @yangpachankis
    @yangpachankis Жыл бұрын

    Ah! This is so brilliant! So that is why the opaque observatory worked!

  • @jamesduncan6729
    @jamesduncan6729 Жыл бұрын

    Sabine was extra snarky in this video. Love it. This woman is a personal hero of mine 😆❤️❤️

  • @dazeitem
    @dazeitem Жыл бұрын

    I love the use of comedy in this episode. It somehow makes it easier to understand now.

  • @viliamvolko6865
    @viliamvolko6865 Жыл бұрын

    I used to watch these videos for the science. Now I watch them for Sabine's genius cheesy jokes 😂.

  • @euanthomas3423
    @euanthomas3423 Жыл бұрын

    Good text on the optical aspects: "Geometry & Light : The Science of Invisibility" by Ulf Leonhardt & Thomas Philbin (Dover publications). However not for the mathematically faint-hearted. Nice video.

  • @chrisfuller1268

    @chrisfuller1268

    Жыл бұрын

    Yes an excellent example of conformal mapping!

  • @ismarcintora2263
    @ismarcintora2263 Жыл бұрын

    Always very clear and scientific explanations, thank you. I.Cintora, MD.

  • @whatsapp-.3481

    @whatsapp-.3481

    Жыл бұрын

    🔝🔝ᴛᴇʟʟ ᴍᴀx ɪᴍᴍᴇᴅɪᴀᴛᴇʟʏ, ғᴏʀ ғɪɴᴀɴᴄɪᴀʟ ʟɪғᴇ ᴄʜᴀɴɢɪɴɢ ʙᴜsɪɴᴇss ɪɴᴠᴇsᴛᴍᴇɴᴛ/sᴏᴍᴇᴛʜɪɴɢ ɴᴇᴡ ᴘʀᴏғɪᴛᴀʙʟᴇ..📈🔝.

  • @annestephens9631
    @annestephens9631 Жыл бұрын

    Marvellous 🙂- Thank you for another fine video.

  • @josephimports
    @josephimports Жыл бұрын

    Love your content. Thank you

  • @mrs.joeschmoe5681

    @mrs.joeschmoe5681

    Жыл бұрын

    Joey.... what did you win? JW ☺️

  • @SykPaul
    @SykPaul Жыл бұрын

    Dr Sabine, have mercy

  • @patrickw9520
    @patrickw9520 Жыл бұрын

    Sabine reminds me so much of my HS chemistry and German teacher.

  • @PhilipRhoadesP
    @PhilipRhoadesP Жыл бұрын

    Another interesting and amusing podcast!

  • @AethyrPrime
    @AethyrPrime Жыл бұрын

    I think you missed a major opportunity by not referencing the Yatuja aka “The Predator”.

  • @KarimDeLakarim
    @KarimDeLakarim Жыл бұрын

    Love you Sabine.

  • @10minutes_Physics
    @10minutes_Physics Жыл бұрын

    amazingly brilliant!!

  • @Zift_Ylrhavic_Resfear
    @Zift_Ylrhavic_Resfear Жыл бұрын

    Thanks for the video :)

  • @marcfruchtman9473
    @marcfruchtman9473 Жыл бұрын

    Thank you for this video.

  • @hihungryimcam
    @hihungryimcam Жыл бұрын

    That random Egyptian pose made me laugh out loud. This was a great video as always.

  • @TheAntibozo
    @TheAntibozo Жыл бұрын

    Love your videos, Sabine. 🐿

  • @juliana.x0x0
    @juliana.x0x0 Жыл бұрын

    Whenever it almost starts to get a bit overwhelming, a lot of information to process at once, she slips a funny little line in, somehow stopping me from overthinking and I end up understanding better and having a good time while doing so. She’s funny and very sharp, I’d love to kick it with this chick!

  • @KrystelSpicerMindArkLateralThi
    @KrystelSpicerMindArkLateralThi Жыл бұрын

    🤣Love it. Great show. This ep makes me wonder just how long it's going to take us to come up with all solutions though at the rate we're going.

  • @warrenfriedman156
    @warrenfriedman156 Жыл бұрын

    Classic video. Thank you.

  • @MrFoolingyu
    @MrFoolingyu Жыл бұрын

    Metaphysics has just taken on a whole new meaning .

  • @vauchomarx6733
    @vauchomarx6733 Жыл бұрын

    Gotta aim for an Ignobel Prize now, by developing a method to calculate the number of Sabine's eyebrows. I see this is becoming a running joke on the show… ;)

  • @CAThompson

    @CAThompson

    Жыл бұрын

    Or, something with dairy-based food materials.

  • @Bassotronics

    @Bassotronics

    Жыл бұрын

    Probably somebody not long ago mentioned her eyebrows for some reason and she’s getting back to that person.

  • @yadt

    @yadt

    Жыл бұрын

    A fairly easy calculation: 1 + 1 = 2

  • @ernstoud

    @ernstoud

    Жыл бұрын

    The number of *hairs* in the eyebrows is the question. I don’t think the answer 2 will get you the Ignobel prize.

  • @francescos7361
    @francescos7361 Жыл бұрын

    I was stupid as student but perseverant so great competencies and educator.

  • @greg4367
    @greg4367 Жыл бұрын

    Greetings from San Francisco, Sabine. Here's a challenge for next week: Can we you work a reference to BOTH Einstein AND cheese? It would make my Saturday complete.

  • @whatsapp-.3481

    @whatsapp-.3481

    Жыл бұрын

    🔝🔝 ᴡʀɪᴛᴇ ᴍᴀx ᴛʜᴏᴍᴀs ɴᴏᴡ, ʜᴇ ʜᴀs ʜᴇʟᴘғᴜʟ ɪɴғᴏʀᴍᴀᴛɪᴏɴ ᴛᴏ sʜᴏᴡ ʏᴏᴜ ᴀɴᴅ ᴀʟsᴏ sᴏᴍᴇᴛʜɪɴɢ ɴᴇᴡ ᴘʀᴏғɪᴛᴀʙʟᴇ ɪɴ ʙᴜsɪɴᴇss ɪɴᴠᴇsᴛᴍᴇɴᴛ📈🔝.

  • @sherriec5258
    @sherriec5258 Жыл бұрын

    The orange plastic dish with the spirals that "changes the refractive index" reminded me of Stonehenge. That's the first thing that popped into mind.

  • @whatsapp-.3481

    @whatsapp-.3481

    Жыл бұрын

    🔝🔝ᴛᴇʟʟ ᴍᴀx ɪᴍᴍᴇᴅɪᴀᴛᴇʟʏ, ғᴏʀ ғɪɴᴀɴᴄɪᴀʟ ʟɪғᴇ ᴄʜᴀɴɢɪɴɢ ʙᴜsɪɴᴇss ɪɴᴠᴇsᴛᴍᴇɴᴛ/sᴏᴍᴇᴛʜɪɴɢ ɴᴇᴡ ᴘʀᴏғɪᴛᴀʙʟᴇ..📈🔝.

  • @alterego3734
    @alterego3734 Жыл бұрын

    With metamaterials with a refractive index smaller than one (but positive), things can be made to appear further than they are. With asuch materials, we could make fake windows with scenery that appears far away.

  • @WarrenLacefield

    @WarrenLacefield

    Жыл бұрын

    Rear view mirrows already do this. Or try looking through binoculars backwards.

  • @chrisfuller1268

    @chrisfuller1268

    Жыл бұрын

    With a refractive index of zero, light appears to move faster than the speed of light, but it does not really because metamaterials store energy causing the strange effects. With a negative index the light appears to move backwards in time.

  • @ShaunVillafana
    @ShaunVillafana Жыл бұрын

    My favorite topic! ❤️❤️❤️❤️

  • @robblerouser5657
    @robblerouser5657 Жыл бұрын

    I love these types of videos!

  • @whatsapp-.3481

    @whatsapp-.3481

    Жыл бұрын

    🔝🔝-ᴄᴏɴᴛᴀᴄᴛ ᴍᴀx ᴛʜᴏᴍᴘsᴏɴ ᴅɪʀᴇᴄᴛʟʏ ғᴏʀ ᴀ ʙᴜsɪɴᴇss ғɪɴᴀɴᴄɪᴀʟ ɪɴᴠᴇsᴛᴍᴇɴᴛ☝️☝️**

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