TBBT S02E02. Loop Quantum Gravity Vs String Theory

Sheldon overlooks the fact that Lesley thinks Loop Quantum Gravity better unites quantum mechanics with general relativity than the String Theory.

[@topherbrink705]

I'm going to use that some day- "I'm listening, amuse me."

[@ququ1639]

Ive been using the word "balderdash" since i saw this video lol

[@Ridisword]

Have you used it yet?

[@topherbrink705]

@@Ridisword ...I have not. It sounds awesome but not 'lose your job worthy' or 'be that annoying appinionated friend worthy'. Perhaps it would only work well if you already have a boss like position over them, but then it might come off as 'douch-like' rather than 'funny fake douch-like'.

[@Ridisword]

@@topherbrink705 Sounds like maybe you should have a child and use it with him :D

[@joshie6213]

@@ququ1639 yeah imma use balderdash

[@kappakappa3110]

Leslie was in his spot

[@SNAPPERTBK1990]

Ohh boy.. Thats y

[@lustrals1273]

LOL

[@basketballplayer011]

I kr

[@rytarousden-0609]

He didn’t say anything about it

[@ezeqeel8352]

Because he had no intentions to sit down at the moment.

[@louiji391]

You cut out the part where Leonard's disappointment turned into excitement when he realized there was 9 more months to comic con

[@ludvicfreire1281]

"Oh yeaaah!"

[@kepcar]

That's why no like from me, we missed the punchline.

[@redbloodbluemoon1423]

Sheldon's reaction at 1:49 after Leslie asks Leonard about children is PRICELESS! 😂

[@little_bee_007]

"I could have accepted our kids genetically unable to eat ice-cream or ever get a good view of parade" - good line for Leonard's lactose intolerance and short height!

[@eternaleffect2499]

Leonard will be a great father 'We will let our children to be old enough to pick a theory for themselves' that's how things should go instead of forcing your views.

[@BlackDiamond2718]

Deepak Nohawar if they even care enough to go into physics.

[@thechosenone1533]

Of course he would be a good father. Look how well he raised Sheldon

[@youngomniverse35]

Everyone's says that until they pick the Flat Earth Theory

[@TheWitchOvAgnesi]

@@youngomniverse35 LMFAO soooo true. Which is exactly why you have to instill some level of critical thinking in their skulls.

[@Netherwolf6100]

@@youngomniverse35 Teach them to question the world around them, and look for facts, not theories, opinions or faith.

[@RhyperiorRanger]

Surprised he didn’t get mad she was in his spot

[@pedrocastillo5694]

Rhyperior Ranger He skipped that because his attempt was more important at the end.

[@artforthewicked4689]

He did. Sheldon knew Leonard agreed with string theory and used that to destroy they're relationship. Effectively getting her our of the apartment and out of his spot

[@ScrewTikTok]

Sheldon knows better than dive into humiliation

[@bonniestar4707]

He knew he'd get her to leave soon

[@DoctorZisIN]

In my household we taught both theories to our kids from kindergarten. We told them they may not choose until they can replicate experimental evidence for either with their physics sets.

[@blancarosales3400]

you taught physics to kindergarten kids that's new

[@DoctorZisIN]

Teach the controversy, we say.

[@jackhughes3981]

The Wife's a String Theorist ..... I know which way my TOEs are buttered XD

[@crazyjoeshorts5256]

I'm getting the sense you're joking and nobody got it.

[@CodeOssyria]

I'm with Josiah here, I'm 99.99% sure you're kidding

[@johnshao9008]

Science couples fight over which theory their children should pick

[@jorgelopez-pr6dr]

Bottom line : you have to agree about physics theories before starting a relationship.

[@walterclements7968]

My theory: its boring

[@cheesemccheese5780]

@@walterclements7968 No one cares.

[@antoinewilliams129]

@@cheesemccheese5780 who asked you?

[@cheesemccheese5780]

@@antoinewilliams129 No one. But that doesn't matter. No one asked Walter Clements to say it's boring and no asked you to reply. but both of you commented.

[@smalltrashman4227]

@@antoinewilliams129 I asked him.

[@osubuckeyefan16]

"Tell me Leonard, how will we raise the children?" hahaha

[@M3t4lManiac]

LOL. "Boulderdash! Matter is CLEARLY made of strings!" Great argument xD

[@train1ng89]

"Are you gonna let him talk to me like that?" brilliant! science trash talk :)

[@markzylstra2947]

Nicely done Sheldon. I have a feeling he knew this would happen.

[@yewang8878]

Actually, I believe Leslie is more than capable of standing up for herself.

[@91rummy]

Sheldon helped Leonard in relationships although he is not an expert. And Leslie made a point at which even Sheldon was shocked.

[@bwgaming9125]

1:50 😂😂 Sheldon's face lmao

[@DrWhoHarvey]

From observing the comments I have one question. Is this what a street fight among physicists is like? Chuckle.

[@zaxhanta3142]

Yup, that's the way we do it ;)

[@luckystarpiano]

Lolll

[@joyshaitan]

This is as close to physicists' arguing as Patrick Bateman is to an average American.

[@beyondviolet]

joyshaitan idk who that is lol

[@juliankirby9880]

Well, back in the day there were actual drunken brawls between philosophers. Look it up it’s amusing.

[@bikrammarasini2021]

1:50 Even, Sheldon is like wtf

[@doctor4961]

LMAO i NEVER noticed that

[@leonard2238]

U left out Leonard’s “on yeah” in the end

[@soggdamone1922]

"Look on the bright side" 😂

[@pititron40000]

i think it's cool that they got these two together, it's a nice nod back to Rosanne

[@danielpm1989]

I never get tired of seeing Darlene and David reunited

[@NeonLambFilms]

Sheldon: "Oh you are so............so...." *Leonards face xD* Leslie: "Listen i gotta go but if you come up with an adjective..Text me!!" Funniest line ever

[@bryant475]

I remember that episode, it was when she corrected his equation :) I've been a hardcore fan of TBBT as a science person myself, but I have to catch up to the last few seasons!

[@Nephromancer3]

The most disappointing part about this is that Sheldon finds more merit in string theory than LQG

[@v_enceremos]

quantum gravity and string theory is bs

[@skdeathxlife]

why

[@coolman54061]

Agreed lol

[@harshsason3725]

Exactly lol

[@arfathkhan5612]

The bright side was so soothing and comforting

[@benedicterhardt5594]

I agree with Lesley, although it was tested if light with different frequencies travels at different speeds and there was no observable difference. In loop quantum gravity you don't need 6 extra dimensions and you also don't need to have a dodgy super symmetry. I personally like LQG much more than string theory.

[@benedicterhardt5594]

That is why it should be researched more.

[@Lughnerson]

Oh foam bubbles.

[@b.lonewolf417]

I'm not a physicist, but I do find the general subject area rather interesting, so I frequently watch videos about those topics. In my mind, probably one of the most fundamental questions is this: *How much are professional theoretical physicists like this in REAL LIFE?* LOL!

[@DarknessIsThePath]

Quite a few might not be this childish but quite a portion of the physics community have become too stubborn.

[@lgoopio]

People sound so smart on the internet. x)

[@ManilenyoMgaDugongSupremo]

That's another way of Sheldon telling us not to sit in his spot

[@RazorBladedLover9]

Sheldon's face at 1:50 is just epic!!!!!

[@TheRebelmanone]

Lennard nailed it "let them choose with their own mind" and she is like "this is a deal breaker" and i am like " i know, she is a tyrant in a dress". She is willing to force her children to abide to her blind beliefs, and some would have done it anyway, but the intelligent ones would never do it without confirming it before they do. But what are the chances an intelligent child makes it out of her grasp with any intelligence left? Next to none if the child don't have help, like from the father.

[@liamdavis2068]

String theory’s not bad. It’s supposed to be a field that a lot of scientists hope will unify all the fundamental forces of the universe and find a 1 inch long equation that will explain the theory of everything. Stephen Hawking and Michio Kaku hav studied it. So I’d go with Leonard on this one.

[@ZEROTOHERO0100]

They are just stupid conspiracy theory geeks

[@liamdavis2068]

No Martin, it’s attempted grand unified field theories.

[@nishantgautam7627]

Ah, seriously? Loop quantum gravity will unify everything if gravity finally gets quantised . String theory proves nothing new, just goes on board with whatever's already known. If string theory makes more sense to you than loop quantum gravity, u are doomed. 🙏

[@liamdavis2068]

Mmmm, string theory may go on board with what is already known but it advances it because to start off, Einstein’s equations breakdown at the instant of the Big Bang or at the center of a blackhole, string theory is a higher theory that helps with that and it takes you before the Big Bang by saying there is a multiverse. It helps define what a Big Bang is which is the collision or separation of two universes. (Think of the universe as a soap bubble). Have you watched Michio Kaku? I have heard of the proposal to quantify gravity and that’s interesting. According to Jim Baggot, It’s not an attempt to find the theory of everything, just to find a quantum theory of gravity. And Hey if Loop quantum gravity proves the existence of antigravity, then I’m in.

[@chicxulub2947]

@@liamdavis2068 I don't get why a lot of scientists cling on to Superdeterminism while the mystery of entanglement CAN be explained by the Superstring Theory, there is nothing better in math to explain such mystery. Superdeterminism is so absurd it completely renders causality non-existent from the Newton's First Law as a mere illusion as if the Universe was constantly playing jokes with all the scientists since Isaac Newton himself and his first law of motion.

[@ottokarl5427]

I know, his character wasn't as worked out as in later seasons, but even Sheldon was confused from the "what about the children?"-jump in her argumentation :D

[@ihfadzsabili9002]

1:50 sheldon's expression jist perfect xD

[@ulmovalar3076]

You left out the best part where in the end Leonard responds to Sheldon "oh yeah" and smiles!

[@jonnnyren6245]

"I should hope so it was a snort of derision." And thus, Leslie has chosen death, to duel with Lord Sheldon Cooper. 🤣

[@abbymorel4925]

"I guess I prefer my space Stringy & not Loopy." Leonard Hofstader 🙂😄😁

[@andreasmkars]

I personally believe in an Electric Universe where energy is transferred around space via Birkeland currents and Plasma is the key to understanding a lot of what we cannot already understand: such as sun spots, the suns corona during an eclipse, pulsars etc.And yes they did screw up at CERN, there was a malfunction with the timing of the satellite when it sent back the data. For some odd reason it didn't compensate for the distance between CERN and the satellite. A rookie mistake if you ask me

[@votercolonelsebastiandoyle293]

The winds of physics are definitely blowing in the direction of Loop Quantum Gravity these days.

[@aaronphillips4127]

VoterColonel Sebastian Doyle ??Says who? I haven't seen any evidence of this. In fact, run 2 of the LHC is expecting to create mini-black holes which would appear in another dimension, thus giving us a view of another universe. Type 1 and/or Type 2a string theory. I don't mean the many worlds interpretation of quantum theory where every quantum possibility is actualized, I mean a real physical other universe..separated by a higher dimensional spacetime. Loop quantum gravity does make some interesting ideas, particularly what it does with singularities. But I think it unifies only parts of quantum mechanics with general relativity.

[@atlas7425]

False.

[@TheRealFlenuan]

All the tests for BOTH theories have come up with no evidence. LQG predicts light of different frequencies moves at different speeds and that black holes should explode; some versions of string theory predict supersymmetric particles, universally slightly curved spacetime, or leaking of the gravitational force over large distances. Experiments have looked for all these things for years and found nothing.

[@Sewblon]

I am in favor of whichever hypothesis makes the math easier.

[@govamurali2309]

Lmao

[@BramTops]

Unfortunately we haven't been able to detect different speeds for light with different wavelengths (colors), but that doesn't rule out LQG per se. And indeed, LQG is able to handle black holes in better ways than ST. I'm with Leslie on this one. Get your act together Sheldon!

[@Beyondthe5thPanel]

Bram Tops I’m not a scientist by any stretch, but I’ve been thinking, why not incorporate the two and see where it takes that? They seem to both have merits and along with Penny and Sheldon’s most recent discussion on actually coming up with a viable reason for string theory using a guitar string example, it seems even more viable.

[@Frandahab]

You can't incorporate both, they are completely different approaches and they are excludent in the sense that if one is true the other isn't.

[@Hanstein.]

1:50 even sheldon had the "WTF? Is this b1tch serious?" moment.

[@PavanKumar-ry4yd]

😂😂 underrated comment man i didn't see it until you said it

[@mrgezau]

Sheldon's reaction on 1:50 is priceless

[@QueenDeaconite]

Are you gonna let him talk to me like that? XD Brilliant.

[@grantg98]

When Leslie mentions children, even Sheldon goes "Huh"?

[@AndyJmovies]

:( they missed my fave bit, leonard's reaction to comic con "oh yeah"

[@EpiCuber7]

Ooh duchess, look at me, my quantum gravity's positively loopy!

[@artrojas4732]

That's my favorite scene of the entire series

[@Digalog]

That's why I like 64 tetrahedron grid model (creating a cube octahedron (isotropic vector equilibrium) describing the geometry of space. creating singularity and is the geometry in polarity and in perfect symmetry to hold a sphere.

[@ansekt93]

Gotta love the snort of derition!

[@ralphenevoldsen9978]

the difference between light speed based upon the "color" or wavelength has been disproven by the Fermi Large Area Telescope... guess String Theory prevails?

[@alexdelaloire8739]

@The Silver Hand I'll sound dumb but "superfluid vacuum" that sounds disgusting...and made me laugh a little bit😂

[@vrramnath]

Actually, Leslie was right, Loop quantum gravity swoop the Nobel Prize for 2020.

[@itzbebop]

How will we raise the children? Even Sheldon recognized the ridiculousness in that statement.

[@SilverHand-fu1jn]

Sheldon happy face at the end lol

[@aragorn1780]

SHE'S SITTING IN SHELDON'S SPOT! NOBODY SITS IN SHELDON'S SPOT!!!!!

[@cazia9]

yep it is, which makes the whole leslie & leonard thing so awesomely funny

[@VincentGonzalezVeg]

the lactose free ice cream has a stronger flavor because it's not overwhelming by the milk, like the sorbets and almond ice creams at sprouts, seriously try them, especially the sprouts brand passion fruit and the mango I hope you enjoy many ice creams of the world

[@ObjectsInMotion]

String Theory is actually a minority in the scientific community, it just gets a whole lot more attention in the Media because it is so much more esoterical.

[@actorben]

I'd LOVE to see how the 4 guys from TBBT would fare on the HBO prison drama, "OZ!"

[@SaveTheFuture]

I have a theory called graviton bubble theory which I am working on. Also, both theories may be incomplete; as small as strings are, the Universe could have structure going on infinitely.

[@jamesbentonticer4706]

I would love to see your mathematics. Plus you seem to demonstrate a fundamental misunderstanding that String Theory and LQG are two competing theories. They explain two different things Megatom...come on. String Theory is a candidate for the unification of the 4-fundamental forces of nature and the force mitigating particles that govern them...and LQG is a candidate for the merging of quantum field theory and general relativity. String Theory says nothing about the quantized curvature of the spacetime fabric and LQG says nothing about the fundamental particles and the fundamental forces. They are two separate entities. Common misunderstanding in the non-science community.

[@aaronphillips4127]

Megatom graviton bubble theory eh? do go on. gravitons are thus far unproven to definitely exist. i assume by bubble you mean a multiverse where each universe is a sort of expanding soap bubble that we are stuck on? not too sure what you mean by your last part. the universe could have structure going on infinitely - what do you mean exactly? that this 1 universe is infinite? seems kind of like you're contradicting yourself. don't rely on BBT to teach you physics. do your own research into each theory (the internet has tens of thousands of resources on both - you just need to actually spend time reading and thinking) and then rewatch. The jokes are subtle yet intelligent.

[@superok4luv2u]

+James Benton Ticer you sir are an idiot

[@atlas7425]

+James Benton Ticer You are extremely wrong. Quantum Gravity describes the unification of General Relativity and Quantum Field theories. Quantum Field theories can be used to describe three of four fundamental forces, the strong interaction, weak interaction and Electromagnetism. they can all be desvribed by several quantum field theories. So, a unification of GR with QFts is the same as a unification of four forces. So Stringtheory and LQG describe the same things. Stringtheory can also be used to describe Quanvum Field theories on curved Spacetime and LQG can also be used to describe several particles, so youre wrong here, too.

[@jameswalker6864]

James Benton Ticer "Common misunderstanding in the non-science community." You mean the non-Physics community. Stop talking like Physics is the only science. I guess a lot of biologists, geologists, paleontologists, linguists or psychologists have no idea on what the hell is the string theory or the loop quantum gravity. On the other hand, most physicists will have no idea on fundamental theories in Geology, Paleontology, Evolutionary Biology, Zoology, Linguistics or Psychology. Common misunderstandings in the Physics community.

[@giodude92]

LOL Leslie was sitting in Sheldon's spot! OMG!

[@maryanndalton5029]

Why is it that Sheldon doesn’t want Leonard to have a love life? And frankly Leonard believes that love is more important than a comic book party.

[@TheSummoner]

This exact scene was the peak of TBBT in my opinion, too bad it more or less coincided with the complete disappearance of Leslie which was one of the best female characters in the show.

[@davido.1233]

In this scene alone, One could easily flash back to Roseanne when they're characters argued over a similar discussion (where she was controlling the relationship and he wasn't doing much to cement himself strongly enough)

[@meganobrien5967]

I wish Leslie had been in more episodes!

[@Xylarxcode]

'We can't let them choose, Leonard, they're children.' To be fair, he did say: 'We wait till they're old enough.' Unless their children would be baby Sheldons, they wouldn't be children once they can make up their minds about complicated matters like that.

[@TheNeonParadox]

When a lecture on LQG ends and KZbin autoplays The Big Bang Theory. 🤣🤣 Oh, and Leslie is clearly right. *ducks

[@EulersDisc]

The term "quantum physics" - In Latin, quantum is the neuter form of quantus, or "how much." ... meaning a discrete amount of something ... it became almost permanently associated with physics when Max Planck, Albert Einstein and their colleagues began developing the field of Quantum Mechanics. Those visionary scientists even invented the verb, "quantize," which they introduced in 1922 to describe the process of subdividing energy into small, measurable increments.

[@bentleyciaraldi6325]

you can tell he copied and pasted

[@EulersDisc]

bentley ciaraldi ... she ... and rude.

[@bentleyciaraldi6325]

oh sorry

[@Jim1905]

@Cuoin Well all we showed is that geometry in the physical world is not purely Euclidean; but nothing about Euclidean geometry makes this assertion, we just assumed it.

[@johnkalwaic4084]

I did not know that these theories were juxtaposed to one-another,till this episode.

[@bikinibottom8857]

Sheldon is adorable ☺️

[@AWSVids]

It's on the house: Lesson #1: If there's a laugh track in the show, don't analyze it like you would a particle collision. Lesson #2: If you don't enjoy it... don't watch it. Don't "waste your time" even further by annoying fans of the show with pointless negative comments on KZbin where you don't even get the name of the show right. Lesson #3: Actors delivering lines that were written by other people is standard practice in film, television and theatre. How is this a criticism of the show?

[@OurWorldofDanceSport]

That laugh🤣

[@sofnaji]

0:59 I love Sheldon's circular logic here to prove himself correct: "because matter has been proven to consist of strings by string theory subatomic particles cannot be formed of minute loops of quantum gravity in the first place". Its such an arrogant way to dismiss a point. Love it.

[@rlombardo1998]

I couldn't stop thinking about it

[@odd-finlander5131]

So interesting !

[@lost_times]

Leslie talked about kids that couldnt eat ice cream or have a good view of a parade but she also wear glasses.

[@mariannebassil4577]

clara pessoa cuz he’s short

[@linkslayer15]

My friend looks like Leslie. We always ask how John Goodman is doing. From Rosanne

[@tsoul1333]

this scene was cut too short: Sheldon explaining the bright side: only 9 more months to Comic-Con. and then leonards face gets a smile and he says, look a complete fool: Ow yeah!

[@lauraclever]

BAZZINGA!!!!

[@justinsegal55]

@nekontears wasn't that the answer to the ultimate queastion from the book series Hitchhikers guide to the galaxy?

[@ZaneShadowcast]

I'm going to have to go with Loop Quantum Gravity...

[@bentleyciaraldi6325]

how string theory claims that there are 10 dimensions and states that matter is made of heterotic strings also bosonic strings

[@manoj9033]

" Tell me Leonard, how will we raise the children? " Sheldon: 👁👄👁

[@blenderpanzi]

@Mirakelmannen But this doesn't horrify physicists, it excites them. Because then they have the opportunity to discover something new and formulate a new theory.

[@gojosan1376]

the same event happened in silicon valley with space and tabs code conundrun

[@Serraphotep]

you'd think that an experimental Physicist like Leonard would support Loop Quantum Gravity or better yet, Plasma Cosmology

[@lauraabreu9288]

I don't know why but I just thought that maybe Leslie should've ended with Zack

[@angelthman]

I understood every single word they said, but that's because I'm an amateur physicist myself.

[@andrewwells6323]

No it encompasses a lot of ideas, but the aim of any Quantum theory of Gravity is to unite Relativity and Quantum mechanics when they break down. Now General Relativity is a theory of Gravity which describes gravity as curvature of Spacetime, since we want to break Gravity into something more fundamental we thus have to break Spacetime into something more fundamental. This makes sense when we consider Loop-Quantum Gravity; it says that Spacetime is produced by underlying spin foam.

[@CheatinGaming]

It would be good if lesley will know that the string theory that sheldon is proud of will hit an end

[@blenderpanzi]

@palindrome06 Is it? What about Gödel's incompleteness theorems?

[@nehemiedorvil1113]

I love that show

[@daredevil6494]

Understanding it makes more funny🤣🤣🤣

[@notimportant4455]

1:51 sheldon's face

[@DanielS2001]

You cut off the last part of the "Comicon" joke (which was Leonard's response).

[@TheRaphaelriv]

Sheldon is so slick!

[@aluacage1054]

Tbh this is how my research advisor said most quantum gravity conferences go

[@nikolaoskouvatsos9222]

I'm doing a project on quantum gravity and this now seems more relevant than ever.

[@yigitcanozturk8475]

what kind of project? can u give more details?

[@nikolaoskouvatsos9222]

@@yigitcanozturk8475 it's basically a literature review on string theory and loop quantum gravity, emphasising on the key ideas of each theory and problems that they (don't) solve. One of the most celebrated theoretical predictions of loop quantum gravity is that it derives the Bekenstein-Hawking formula for the entropy of a black hole, which was mentioned by Leslie in this video as an advantage of LPG against ST.

[@yigitcanozturk8475]

​@@nikolaoskouvatsos9222 But Sheldon says in a different episode, you can find the general relativity equations in string theory with 11th dimensions. These are theoritical predictions,so i hope your project gets us somewhere in this debate. Wish the best for u.

[@blenderpanzi]

@BellaRogueSinclair Well, not after the end of the video.

[@palindrome06]

@blenderpanzi I truely admire Gödel's theorems. But even incompleteness has its own beauty and preciseness. Still, any shown statement remains true forever with or without incompleteness, and incompleteness doesn't kill preciseness of mathematics, i.e. the rules of reasoning are preserved while deriving results from definitions.