Summary
Marketers are increasingly vocal about the inefficiencies of their advertising budgets, labeling ineffective spending as "bull spend." This term highlights the disconnect between metrics that appear favorable and the reality that often becomes apparent to financial officers. The conversation reflects a broader trend where marketers are urged to reassess their strategies and focus on more effective channels, such as LinkedIn, which offers targeted advertising options.
In the realm of astrophysics, the discussion shifts to the study of black holes, which remain elusive and challenging to investigate directly. Despite their theoretical foundations, black holes are difficult to study due to their nature and distance from Earth. However, researchers are exploring "analog black holes"—physical systems that mimic the behavior of real black holes, allowing for experimental study. This concept, initiated by physicist Bill Unruh, has led to various experiments, including those using water tanks to create conditions similar to black holes.
Recent advancements in experimental physics have demonstrated that analog black holes can exhibit behaviors akin to Hawking radiation, a phenomenon predicted by Stephen Hawking. These experiments, particularly those involving Bose-Einstein condensates and water vortices, provide insights into the fundamental properties of black holes and the nature of spacetime. While some scientists remain skeptical about the applicability of these analogs to real black holes, they represent the best current approach to understanding these cosmic mysteries until more direct methods become feasible.
Show Notes
PBS Member Stations rely on viewers like you. To support your local station, go to: http://to.pbs.org/DonateSPACE↓ More info below ↓Uploaded 22-06-20Sign Up on Patreon to get access to the Space Time Discord! https://www.patreon.com/pbsspacetimeCheck out the Space Time Merch Storehttps://pbsspacetime.com/Sign up for the mailing list to get episode notifications and hear special announcements!https://mailchi.mp/1a6eb8f2717d/spacetimeBlack holes are about the worst subjects for direct study in the universe. But at this stage, it’s all we can do to convince ourselves of their existence. Actually studying the physics of real black holes is much, much harder. I mean, we could try to make one - but that’s way beyond our current tech level, and also potentially humanity-destroying. Well it turns out we don’t need to make real black holes to at least get started with the lab work. We can instead study analog black holes - and by analog, I don’t mean old fashioned clockwork black holes - I mean analogies. Physical systems that aren’t black holes but that behave in similar ways - and may reveal the real behaviours of real black holes.End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/channel/UCRl6-nb4iOnsij-vnpAjp0QMatt Visser Paperhttps://arxiv.org/abs/gr-qc/9712010Hosted by Matt O'DowdWritten by Daniel Garisto and Matt O'DowdGraphics by Leonardo Scholzer, Yago Ballarini, and Pedro OsinskiDirected by: Andrew KornhaberCamera Operator: Bahaar GholipourExecutive Producers: Eric Brown and Andrew Kornhaber#space #astrophysics #blackholesPrevious Episodes Referenced: Unruh Radiation https://www.youtube.com/watch?v=7cj6oiFDEXcHawking Radiation: https://www.youtube.com/watch?v=qPKj0YnKANw&vl=enHow Black Hole Spin Space Time https://www.youtube.com/watch?v=UjgGdGzDFiM&t=2sWhat’s On the Other Side of a Black Hole: https://www.youtube.com/watch?v=T4oYvSH6jJ8Special Thanks to All our Big Bang Sponsors! Big Bang SupportersAlexander TamasCaed AldwychDavid NicklasFabrice EapJuan BenetJustin LloydMorgan HoughRadu NegulescuQuasar SupportersCarson KahnChristina OegrenMark HeisingVinnie FalcoHypernova SupportersChuck ZegarDanton SpiveyDonal BotkinEdmund FokschanerHank SJohn HofmannJohn PollockJohn R. SlavikJordan YoungJoseph SalomoneJulian TyackeMathewMatthew O'ConnorSyed AnsarTimothy McCullochWilliam BryanGamma Ray Burst SupportersA GAdrian HatchAlecZeroAndreas NautschAndrew RichmondBleys GoodsonBradley JenkinsBrandon labonteBrandon LattinBrian BlanchardBruce BCass CostelloCraig StonahaDan WarrenDaniel LyonsDarryl J LyleDavid BethalaDavid HughesDawn M FinkDevon RosenthalDFaulkEric KieblerFrederic SimonGeoffrey ShortGraydon GossGreg SmithIsaac SuttellIsmael MonteceljechamtJohn FunaiJohn GriffithJohn RobinsonJosh ThomasJustin WatersKevin LeeKevin WarneKyle HoferLuaanM DMalte UblMark Daniel CohenMichael ConroyMikhail KlakotskiyMirik GogriNick VirtueNick WrightNickolas Andrew FreemanOliver FlanaganPatrick SuttonPaul RoseProtius ProtiusRainwalker WinterpainterRichard DeightonRobert IlardiRobert WalterScott GossettSean WarniahaShane CalimlimSimon OliphantTatiana VorovchenkoTim StephaniTonyfaceTybie FitzhughYannick WeynsYurii Konovaliuk Learn more about your ad choices. Visit megaphone.fm/adchoices Learn more about your ad choices. Visit megaphone.fm/adchoices
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Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACEUploaded 02-11-17If vacuum energy really does have the enormous value predicted by quantum field theory then our gently expanding, geometrically flat universe shouldn’t exist. This is the vacuum catastrophe.You can further support us on Patreon at https://www.patreon.com/pbsspacetimeGet your own Space Time tshirt at http://bit.ly/1QlzoBiTweet at us! @pbsspacetimeFacebook: facebook.com/pbsspacetimeEmail us! pbsspacetime [at] gmail [dot] comComment on Reddit: http://www.reddit.com/r/pbsspacetimeHelp translate our videos!https://www.youtube.com/timedtext_cs_panel?tab=2&c=UC7_gcs09iThXybpVgjHZ_7gPrevious Episode:The Missing Mask Mystery | Space Timehttps://www.youtube.com/watch?v=RchRrngfjQYLinks to Comments Response:Michaelhttps://www.youtube.com/watch?v=X5rAGfjPSWE&lc=z23swryzgkibc3atqacdp43a31ukx3xnflbaomxcwwlw03c010cJeremy Zambellihttps://www.youtube.com/watch?v=X5rAGfjPSWE&lc=z23dhh04rtmeez1rb04t1aokgicw4o1gjiic2vmezi2fbk0h00410TS1336https://www.youtube.com/watch?v=X5rAGfjPSWE&lc=z22sux052luoih4xz04t1aokgu2halbv0cnkiqu4azyerk0h00410Eliran Cohenhttps://www.youtube.com/watch?v=X5rAGfjPSWE&lc=z22yzr5z3u3yvn2hs04t1aokgnid302xmdruho1qwzylbk0h00410 Let’s talk about vacuum energy from a theoretical standpoint. From the perspective of quantum field theory, every point in space is represented by a quantum oscillator; one for each elementary particle type. Higher energy oscillations represent the presence of real particles. However even the lowest possible energy oscillation – the one corresponding to the absence of particles – has some energy. Written and Hosted by Matt O'DowdProduced by Rusty WardGraphics by Kurt RossAssistant Editing and Sound Design by Mike PetrowMade by Kornhaber Brown (www.kornhaberbrown.com)Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big BangBITISMCoolAsCatsDavid NicklasQuasarTambe BarsbayMayank M. MehrotaMars YenturMark RosenthalDean FuquaY2Justin LloydHypernovaEdmund FokschanerMax LevineMatthew O’ConnorEugene LawsonBarry HatfieldMartha HuntJoseph SalomoneChuck ZegarCraig PetersonJordan YoungRatfeastJohn HofmannThanks to our Patreon Gamma Ray Burst Supporters: Denys IvanovNick VirtueAlexey EromenkoNicholas RoseScott GossettMark DykstraChris HicksMark VasilePatrick MurraySultan AlkhulaifiAlex SetoMichal-Peanut KarmiErik SteinDaniel LyonsKevin WarneJJ BagnellJ RejcAmy JieAvi GoldfingerJohn PettitShannan CatalanoFlorian StiglmayrYubo DuBenoit Pagé-GuitardNathan LenizJessica FraleyLoro LukicBrandon LabonteDavid CraneGreg Weiss Learn more about your ad choices. Visit megaphone.fm/adchoices Learn more about your ad choices. Visit megaphone.fm/adchoices
Viewers like you help make PBS (Thank you 😃) . Support your local PBS Member Station here: https://to.pbs.org/DonateSPACEUploaded 10-08-17Could it be that all the electrons in the universe are simply one, single electron moving back and forth through time?You can further support us on Patreon at https://www.patreon.com/pbsspacetimeGet your own Space Time tshirt at http://bit.ly/1QlzoBiTweet at us! @pbsspacetimeFacebook: facebook.com/pbsspacetimeEmail us! pbsspacetime [at] gmail [dot] comComment on Reddit: http://www.reddit.com/r/pbsspacetimePrevious Episode:Dark Flowhttps://www.youtube.com/watch?v=xgdNBQCdhdAIn the spring of 1940, the great physicist John Archibald Wheeler had a flash of insight. He picked up the phone and called Richard Feynman. The fateful conversation began, “Feynman, I know why all electrons have the same charge and the same mass." "Why?" asked Wheeler’s former graduate student. "Because, they are all the same electron!" Wheeler went on to describe the One-Electron Universe idea: that there exists only one electron, and that electron traverses time in both directions. It bounces in time, eventually traversing the entire past and future history of the universe in both directions, and interacting with itself countless times on each pass. In this way it fills the universe with the appearance of countless electrons. And when the electron is moving backwards in time it is a positron; the antimatter counterpart of the electron.Written and Hosted by Matt O’Dowd Produced by Rusty WardGraphics by Kurt RossAssistant Editing and Sound Design by Mike PetrowMade by Kornhaber Brown (www.kornhaberbrown.com)Comments answer by Matt:0xFFF1https://www.youtube.com/watch?v=xgdNBQCdhdA&lc=z23sjnwjrwnljxe3macdp435v2eqfl1uknp1kknjllxw03c010c Daniel Grasshttps://www.youtube.com/watch?v=xgdNBQCdhdA&lc=z230gbubioqjyn1vfacdp43azemsjdresxvjbu412tdw03c010c M Paulsonhttps://www.youtube.com/watch?v=xgdNBQCdhdA&lc=z221xpzafrikhxyjf04t1aokgiuxpnkzxeknjelcsx0jbk0h00410 Special thanks to our Patreon Big Bang, Quasar and Hypernova Supporters: Big BangCoolAsCatsDavid NicklasQuasarTambe BarsbayMax LevineMayank M. MehrotaMars YenturMark RosenthalDean FuquaHypernovaEugene LawsonChuck ZegarJordan YoungRatfeastJohn HofmannJoseph Salomone Martha HuntCraig PetersonScience Via MarketsBarry HatfieldThanks to our Patreon Gamma Ray Burst Supporters: Peter DurocherMichael KersChris HicksMark VasilePatrick MurraySultan AlkhulaifiAlex SetoJared MooreMichal-Peanut KarmiBernardo HigueraErik SteinDaniel LyonsKevin WarneJJ BagnellJ RejcAmy JieAvi GoldfingerJohn PettitShannan CatalanoFlorian StinglmayrYubo DuBenoit Pagé-GuitardNathan LenizJessica FraleyLoro LukicBrandon LabonteDavid CraneGreg Weiss Learn more about your ad choices. Visit megaphone.fm/adchoices Learn more about your ad choices. Visit megaphone.fm/adchoices
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