Visualizing the Planck Length. Why is it the Smallest Length in the Universe?

Visualizing the smallest size in the universe - Planck Length & why you can’t go smaller
Visualizing Planck length - why is it the smallest in the universe? Graphics courtesy of Michael and Cary Huang: www.htwins.net/
The scale of the universe is bigger than you can imagine. It is also smaller than you can imagine. The smallest lenth theorized to be possible, the Planck length is about 4 X 10^-35 meters. Just imagine things that are about the size of your body. Things like the giant earthworm that lives along streams in Australia. Or a big beachball, which can be found near oceans and beaches all across America.
Now, lets go smaller by one order of magnitude, so now we are looking at things that are on the scale of about 10 centimeters. These are things like the shrew, or a chicken egg.
Now let’s go a thousand times smaller than the scale of a human being, on the order of 1 millimeter or one thousand of a meter. Here, you’ll find things like a grain of sand or dust mites.
Let’s go 1000 times smaller than this scale. Now we are going a hundred times smaller than the width of a human hair. And ten times smaller than even bacteria. Here, we are going to find things like large viruses.
Let’s keep going to 1000 times smaller this. This is nanometers, or one billionth of a meter. Now we are exploring a universe that we can’t see with optical telescopes. This is on the scale of the size of molecules like DNA and the glucose molecule, that your body uses as its source of energy. And the scale of the biggest atom - cesium.
Let’s go 1000 times smaller than this. This is one trillionth of a meter. This is on the order of the wavelength of gamma rays. This is the highest energy electromagnetic radiation, consisting of the most energetic photons.
Let’s go 1000 times smaller than this. This is 1X 10^-15 or one quadrillionth of a meter. This is the size of particles that make up the nucleus of all atoms, protons and neutrons. The size of a typical atom is however is 100,000 times bigger than its nucleus.
You would think that we are getting close to the smallest size theorized to exist - the plank length. But we are nowhere close. You have to go a quadrillion times smaller than one quadrillionth of a meter, or 1 X 10^-30 of meter….and you would still need to go another 100,000 times smaller than that, or 1 X 10^-35 meters. Then you would be at the plank length. In fact, if an atom was the size of the earth, a planck length would be smaller than the size of an atom - it would be about the size of a proton.
But What exactly is a Planck length and why is it the smallest length?
Planck length is actually derived from the fundamental constants of the universe that define the properties of space-time: The speed of light - c which signifies the maximum speed of communication in the universe. The gravitational constant - G, which signifies the magnitude of gravitational force between two massive objects. And the reduced Planck Constant - h bar, which links how much energy a photon carries depending on its electromagnetic frequency.
These are really the only constants that define the fundamental properties of the universe and all its contents. By taking different mathematical combinations of these constants, and reducing their units, you can get a length. By similar mathematical manipulation, you can also get planck time and planck energy.
But what does this length mean? Why is it significant?
It is the smallest length at which gravity would have an effect. It is the scale and size of the strings in string theory. It is also the scale at which space-time is theorized to become quantized in Loop quantum gravity theory.
So why is it the smallest length? In 1964, C Alden Mead determined that using the known laws of quantum mechanics and laws of gravitation, it is impossible to determine the position of an object to a precision smaller than the Planck length. So from what is currently known about quantum mechanics, a length smaller than the Planck length has no meaning.
Note that I said “known” laws. It is possible that at lengths smaller than the Planck scale, gravity or quantum mechanics behaves completely differently, that we may not yet know about. This is quite possible. So until we find out what happens at such small scales, we will need to wait for a future Einstein to reveal this to us.
One of the remarkable things about Planck length is that since it is derived from the fundamental constants of the universe, which by definition applies to everything, it will be the same no matter what language you might speak, what units you might use, or even what planet you might come from.
Ao, if we ever come across aliens from another world and compare notes, we both will have the same length for the smallest length possible in the universe.
#plancklength

[@Alorand]

Even the science videos are not safe to watch in November.

[@Hgulix62]

Hhh

[@xepiconex]

NNN is pretty tough this year, but we can get through it if we try hard enough.

[@Hgulix62]

@@xepiconex - It's not that hard

[@tdamrethebeast2196]

Lol agree

[@venomitemusic]

2:28 ?

[@arcanearronax7525]

I may be drunk, but I did not expect to see a thong bikini in a video about the planck length.

[@palmax256]

@Nissim Levy actually quantum talking is the G-String Thong the shortest lenght possible, theorized in the string theory

[@theuniversewithin2065]

Never not expect a thong.

[@EternalSilverDragon]

You know it was CGI?

[@lordx4641]

@@palmax256 who knows whats smallest because our prblem is indeed with what small and big even mathematically priblematic it seems like infinite loop

[@fss1704]

@@EternalSilverDragon Where do i download the program then... asking for a friend

[@MikeC9903]

Beach Ball Girl. That's all I remember.

[@Startrooper5555]

And the girl in bed.

[@sholmesbrown]

lol I was thinking when I saw the bed girl 🥰 damn those panties are tight

[@jeylful]

We need a boy to make it even

[@perfectionbox]

And the swimming girl at the start with the thong bikini bottom. Things that make you go "hmmm..."

[@sholmesbrown]

triggered feminist in 3....2....1 🤣

[@PaulMatthis]

Physicists: Here's some incredible fundamental truths about our universe. This guy: Needs more stock footage of a girl in a bikini

[@dulander]

Gotta get them extra views in somehow.

[@badhombre4942]

Ain't that the fundamental truth.

[@-_James_-]

There's a rumour going around that she had a beach ball. I didn't see it myself.

[@anttumurikka8728]

can you unified those two?

[@j1l9i8n0]

But what about the girl in bed tho

[@lesleygamerx9463]

The "x" on mobile ads be like:

[@user-kx5es4kr4x]

They are 2 times smaller than half a plank length

[@AZSG69]

LOL

[@realbignoob1886]

Lmfao

[@mark6302]

nice

[@Rhakjellg]

@@user-kx5es4kr4x so ⅛ if a Planck length?

[@denki2558]

bacteria: 99% are harmless [3:42] sanitizer: removes 99% of bacteria

[@ArvinAsh]

Yep. Hopefully they don't kill just the good bacteria.

[@deesalmon9632]

Lol isn't it ironic

[@Burt_Cokaine]

Orwell would call that, "double-speak".

[@drew-shourd]

....fear sells...

[@Chizzoide]

so, probabilistically, when you use sanitizer, there's a high chance to attack that harmful bacteria than not. Not ironic just common sense. Maybe confusing because you might think of 'not harmful' as we shouldn't kill 'em, but I don' t think that's the correct approach if you're certain that potential bad bacteria is very dangerous.

[@ViciousViscount]

Turns out I'm a huge fan of beach balls.

[@ArvinAsh]

Haha, me too.

[@oatlord]

More of a bed mites guy myself.

[@alphagt62]

Yes, the beachball scene was most interesting.......

[@xavierstargher860]

the scale of her boobies was impressive.

[@aagallegos94]

3:18 & 3:21... You’ll thank me later... Lmfao jk!!

[@harperthejay]

This was actually the first time that I was able to understand *why* the Planck Length is the smallest length at which our understanding of physics can apply. I've known that fact forever, but I've never been able to understand why. Thank you :D

[@jengleheimerschmitt7941]

Wait, you're telling me the universe is even bigger than a whale?

[@prodsiman9051]

quote: the great shrimp

[@Myrslokstok]

It realy seams so even tough I cant comprehend it.

[@Astitva]

Nah, it isn't it's just science fiction

[@louism.3435]

You wouldn’t even be close to comprehend 1 light year.

[@Leekodot15]

I thought the universe WAS a whale.

[@vincentdamaso6719]

I'm not even 10 seconds in the video and I decided to scroll down the comments already... because of ynow..

[@Chizzoide]

damn exciting blue whales 🔥

[@TheNightFlower]

Samesies. 🤔

[@someoneelse1582]

And then you look down again at 2:28, then AGAIN at 3:13. Best. Physics. Video. Evah.

[@shanetaylor2743]

Predictable fallout

[@mh1970]

Because science

[@skylesai]

Best Info: 2:30 3:13

[@chercheunpseudo6340]

You dirty bastard XD

[@theshermantanker7043]

Why is the girl in her underwear lol

[@OneDerscoreOneder]

TheShermanTanker sleep

[@Gabo-wg3dv]

@@theshermantanker7043 she's sleeping

[@patricksarama4963]

TheShermanTanker I’m not complaining

[@samrl1170]

"Think of the largest thing you can imagine... a blue whale?" bro, we're not retarted.

[@davek3003]

You are, you spelled the work wrong.

[@samrl1170]

@@davek3003 you spilled "word" wong

[@davek3003]

@@samrl1170 lmao

[@maximofffffff]

@@davek3003 Maybe we al are

[@orang1921]

@@samrl1170 you spelled "spelled" an "wrong" wrong

[@Sk0p3r]

The stock footage on this channel is really something at times xD

[@ioqajeeaspirant8860]

shes seminaked

[@FlopD0g0]

@@jamesk7063 don't think that's what they're talking about

[@666sarvan]

Think of a biggest thing you can think of “Girl’s ass pops up..😂😂

[@omsingharjit]

as i expected to see such comment then i find your 😂😂

[@CyanWatercress4]

Not funny didn’t laugh

[@ultimategamer2669]

I LIKE BIG BUTTS AND I CANNOT LIE

[@nogod7184]

Exactly my thoughts when I saw that at 0:07

[@sohee7597]

"A blue whale? The great pyramids of Giza? Your penis right now?"

[@thoaily8352]

For those who need: Swimming Girl: 0:06 Beach Ball Girl: 2:28 Sleeping Girl: 3:14

[@princeofallnegros4035]

I just noticed that in every one of his videos there's always a cute girl with a beach ball somewhere in the video...lmao

[@EternalSilverDragon]

Swimming girl is just computer graphics.

[@TheRogueX]

Sleeping girl is best girl.

[@pooounderscoreman]

@@TheRogueX yes but would you eat her dead skin cells?

[@ariela.877]

You're doing God's work

[@johnstrawb3521]

0:08 - surely one of the finest examples of physics in action ever depicted.

[@abyssmanur3965]

3:13 The Universe is amazing.

[@bigulf4872]

agree

[@infinityj2268]

🍑

[@TRON0314]

@@infinityj2268 I think the equation is 🍑+ ⚛ + 🔬 = 👍

[@infinityj2268]

@@TRON0314 Nah. 🍑+🍆=👍

[@Bigman-fq6oj]

@Bike Speedster nah 🍆 + 🍑 +🛀 = 👍

[@clarkdenunzio573]

i find your analogies of beach balls and dust mites to be elegant, concise, and highly effective at conveying the topic. keep up the good work, sir.

[@nsnopper]

😂😂😂😂

[@snarfsnarfff]

America wooooo!

[@stevebrindle1724]

I never noticed the bikini-clad girl 😏

[@gatekeeper88]

what beach ball?

[@jameskerry41]

and here I thought all Physicist felt girls were all 'yucky'

[@Will_Hallett_Art]

Yes a blue whale is definatley the biggest thing I could ever imagine

[@Soupy_loopy]

I can't even imagine a blue whale. I have no idea what they look like or how big they are supposed to be. How many people have actually seen a blue whale?

[@2222-s9x]

@@Soupy_loopy true

[@steinadler4193]

@@Soupy_loopy I have seen a stuffed blue whale in the Natural History Museum in Göteborg (Sweden). Gigantic. I have also seen the blue whale skeleton in the Natural History Museum in London. Have a Google picture search!

[@elck3]

It’s about the length of your school’s basketball gym lengthwise. Imagine seeing that

[@Reignor99]

are you stupid? mount everest is WAY bigger than a blue whale lmao

[@artdonovandesign]

This is the finest video about Plank Length on all of KZbin. Comprehensive. Informative. Understandable. Enjoyable and absolutely Startling! Thank You, Professor Ash!

[@jrspringston]

I came for science, I also came for other reasons.

[@1999yasin]

oh god... no!... shut up...

[@thememescape8167]

This is a underated comment

[@ImpeRiaLismus]

I turned 69 likes into 70.

[@sylon3431]

Марк Пиво he too dangerous to be kept alive !

[@Numberonesorabjifan]

@@ImpeRiaLismus you monster

[@teamatfort444]

“Think of the biggest thing you can think of” YO MAMA GOT HIM

[@andrewvida3829]

Should have stopped at "mama".

[@user-ov1mn8zg3e]

yeh but she thicc tho

[@xandeath75]

@@andrewvida3829 Got em

[@erictello5189]

I love how you put the occasional women in the conceptual analogies. Really keeps my attention span 10 times as much as its usual potential.

[@oldmangranny5oldmangranny56]

It's for equality. ;-)

[@One.Zero.One101]

Bunch of virgins in here.

[@hannahdavis7089]

at 7:06, c^3 is written as length^2/time^3 where it should be length^3/time^3, or the planck length would simplify to the square root of length^3

[@BrianNatonski-wt3mv]

Yes I was gonna say that but you beat me to it. Two years ago. 😊

[@kagezhang3748]

Me: * cuts the planck length in half * The laws of physics: Bruh

[@tompurcell1499]

What with?

[@rj6110]

Tom Purcell a really small pair of scissors

[@tompurcell1499]

@@rj6110 Quantum scissors, eh? Think what fun you have with the Universe by cutting into the very fabric of spacetime. Wow! A suit made out of pure spacetime (dry-cleaning only, of course). I want one!

[@tompurcell1499]

@Erikas Sadauskas I do hope you're just joking, pal!

[@tompurcell1499]

@Erikas Sadauskas Have you got a pull-string coming out of your back or do you have anything of use to say?

[@plzzz]

The amount of girl in underwear in this vid, 10 to the power of millionth. I like it.

[@StanTheObserver-lo8rx]

Oh man,she was gorgeous. Now,find out who she is....

[@martiddy]

@@StanTheObserver-lo8rx which one?, the girl in the bed or the one with a beach ball?

[@StanTheObserver-lo8rx]

@@martiddy All,even the cartoon thing might be racy-ha. If you notice,sleeping girl seems to get more "chilly" the longer she is on camera..if you know what I mean. Science is great!

[@VerisimilitudeDude]

@@martiddy Both

[@clemfandango5908]

Right

[@stonewallgregg]

many pirates had to walk the planck and the length was longer back in those days

[@es8559]

Baby on Planck. Lol

[@robertnett9793]

Everythings better with pirates - didn't you know?

[@keefebaby]

Not long enough for them

[@apple54345]

and they had to walk the planck uphill both ways.

[@victorpopescu8073]

That's a different type of Plank idiot, p.s. It's plank not planck

[@Str4t0sph4r4]

I decided to click on some other videos after I saw the person with the beachball.

[@TheElectra5000]

Came for the science, stayed for the girls.

[@fss1704]

yeah if you find the name please reply

[@Parpl22]

2:29

[@Parpl22]

I’m more interested In bikinis

[@comfixit]

Came for science? I hope that is not what they mean when they say science can be messy.

[@vwlz8637]

u also came for the girls if u know what i mean 😏😏😏

[@Spiderhip]

3:20 I was almost seeing it with the naked eye :D

[@Mark_badas]

Are there eyes which wear something?

[@friedegg3732]

@@Mark_badas yes

[@dick220]

But i cannnn

[@EgnachHelton]

2:23 Just imagine things that are about the size of the your body: things like the giant earth worm... ABOUT THE SIZE OF YOUR BODY THE SIZE OF YOUR BODY SIZE OF YOUR BODY OF YOUR BODY YOUR BODY BODY ....

[@toshirokardevaand2772]

"Body" doesn't look like a word to me now, thanks...

[@Quasarel]

...

[@maxovercharge2961]

here we gp again buddy😑

[@maxovercharge2961]

Oops i replied to the wrong comment oopsie

[@madhu5465]

bnjhuygyu

[@know1374]

The sleeping beauty caused me to overlook some of the great mysteries of the universe.

[@KingoftheJuice18]

Beautiful explanations--seriously. As a non-science person, this was very clear and helpful. You also spiced it up with other beautiful elements. Well done!

[@esegueyjose7870]

him: “think of the biggest thing you can think of” me: “IC 1101” hin: “maybe a blue whale” me: “oh..”

[@proxy4620]

Same, IC 1101 is what I consider the largest thing in the universe that we know of. Technically galactic superclusters are larger but they have no form or arrangement, their existence as a single entity is just a name for a big group of something. While IC 1101, as a galaxy, has form and anatomy and everything in it has something to do with the rest of it. So I agree it's the biggest "thing" discovered in the universe so far.

[@Srontgorrth]

What's meant with 'you can think of' is not a thing you got a name for. Humans simply cannot imagine the size of galaxies. But I agree, a whale would pop up in very restricted minds as the biggest thing to imagine 😃

[@steinadler4193]

Double DD?

[@arenl8926]

lol nerd, i thought of yo momma's bootayyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy

[@onevastanus]

Know of and imagine are not the same. That's why he is telling you a blue whale. It is probably the biggest thing you can imagine. Imagine means visualize with some degree of creative accuracy. You know NOTHING about IC 1101 except the name. He means imagine, of course, or any person with a brain would say "universe", not a minor part of it.

[@XEinstein]

This video really should be the start of a whole series that explores the holographic principles, loop quantum gravity, information theory and the entropic universe

[@ArvinAsh]

Einstein X That’s actually next.

[@christianheichel]

@@ArvinAsh awesome!! Will that also include info on Planck time and volume? Would you also detail why these measurements are the smallest theoretical sizes?

[@ArvinAsh]

Chris Heichel Yes. I talked about it a bit in this video. It is based on mathematical manipulation of the same fundamental constants. So basically the same reason that Planck length is the smallest.

[@leviathansnemesis3742]

No, It should start as it did with a bikini shot of a woman's ass underwater. I don't care if its animation.

[@Ice-Fall]

@@leviathansnemesis3742 With some of the comments, I suspect beach girl and bed girl won't be making an appearance in upcoming vids. :(

[@danieljones9245]

Arvin Ash did a REEEEEAL professional job here at presenting his explanation of the extremes of size. If I were to critique anything Arvin said here, it would be his inclusion of loop quantum gravity, because that idea is highly speculative, thus subject to doubt.

[@squirtreynolds2853]

Can we see the beach ball part again? I feel like that was pretty essential to this whole deal.

[@edwardtupper6374]

Absolutely. This is an important reference to the USA's historical role in nuclear physics, the bikini of course representative of their Pacific Islands testing ground. Science. And history :)

[@joshuacornelius25]

The Planck length is the smallest degree of entanglement between two points within the quantum field. If the planck unit was zero, the quantum field would collapse into a single point of infinite value (or zero since a single point without a reference has no value). This unit gives rise to the constants we observe in our universe. The anthropic principle is the best explanation for why we live in a universe with the planck length we find. The many worlds interpretation would suggest that the planck length is different in other universes, and that quantum gravity is a shared force as a result of entanglement across all possibilities in the wave function. The planck length in a particular universe determines which portion of that force exists in that universe.... i.e. The strength of gravity.

[@firstname4304]

Joshua Cornelius interesting

[@kidzbop38isstraightfire92]

The planck length determines the strength of gravity? I mean, yes indirectly, but there's no reason for the "vacuum energy" of the planck length to be what it is. In other words, the planch length-to-gravity strength ratio could have been any number, not just the one it is. So it's not exactly why gravity has it's particular strength. There really is no reason for gravity to have it's particular strength... It could have been anything.

[@johnroscoe2406]

I like turtles.

[@pastmasterdan4080]

It’s the illusion of mass?

[@bltzcstrnx]

It's the smallest resolution that our universe simulation able to compute. Same as C, it's the simulation tick time.

[@severalwolves]

Dude, don’t tell me what I can and can’t imagine. I’m actually, like... super, uh... super imagination ... -having. Guy.

[@namr1174]

Lol

[@inactiveaccount293]

@@namr1174 warning crazy virgin found KZbin app on his ps vita

[@namr1174]

@@inactiveaccount293 Hhhhhaaaahhhhhaaaaaa

[@Ludifant]

He should have said: remember instead of imagine or "no abstracts", just experience. We have an abstract notion of the universe, the thing that we imagine is actually just illustrations or visualisations, that is not the universe.. "Ceci n´est pas un pipe." You can only manipulate, experience and therefore remember the universe on a near human scale. Good point, well made.

[@K.B.Williams]

@@Ludifant Interesting. Never thought of it that way. Or can I say I never imagined it that way? Don't think I ever experienced it that way either. So yeah, I never thought of it that way.

[@smallstudiodesign]

So beautifully presented and the narrator speaks in a way that offers a touch of intrigue & enthusiasm (without being corny/ cheesy).

[@huhneat1076]

"The universe is even smaller than it is large" *_Hmm_*

[@anarchistalhazen7084]

I guess he implicitly meant relative to our order of magnitude

[@benbooth2783]

Yeah I thought that was BS too.

[@simplig1272]

@@anarchistalhazen7084 indeed he did meam that, but it barely made sense. nit to mentiom that when he speaks of universe, he speaks of onservable universe. we have no idea how big the scales go beyond what we can detect.

[@TurdFerguson456]

Everything should be automatically considered from our perspective unless stated otherwise. Examples: 1. The sun is tiny when compared to the biggest stars in the universe. 2. My balls are huge. 3. That thing is massive compared to an ant.

[@medexamtoolscom]

Yeah he said that really badly. He should have said "the scale of the smallest meaningful structures of the universe is more small, than amount that the scale of the observable universe itself is large."

[@alcyonedevelopments7398]

8:20 Props for saying that there might be new discorveries in the future. That's something i'm missing from many science videos (or documentaries): The acknowledgement that we, despite knowing more than ever before, are still far away from knowing everything.

[@gaming4life25]

3:12 yup perfect footage to be put in a science video... Smh

[@calitreesweet]

Btw, here depositphotos.com/182727910/stock-video-timelapse-of-female-changing-sleeping.html

[@immediamalcoccinello483]

"I'm an adult virgin"

[@JackmeriusTacktheritrix-000]

Biology and anatomy _is_ science

[@grandlotus1]

Professor Ash: I am a big fan! When I listen to you, I feel less dumb and that feels good.

[@ArvinAsh]

Glad to hear that.

[@SerunaXI]

Finally, a way to measure my length.

[@trongduong4901]

It is the known knowledge, it maybe wrong haha. And you are atoms which change every microsecond. Too hard to measure you exactly. Finally forget it!

[@DutchBane]

R/suicidebywords nice!

[@KiranR2612]

TLDR: Planck length is the 'pixel'(or information) density of the universe.

[@Ludifant]

If we could prove the universe is even quantised, the planck length would be a candidate to express the resolution, yes, but that´s missing almost everything that´s cool about thinking about it and realising how amazing everything is.

[@moladiver6817]

Voxel

[@trongduong4901]

Everything is theory, science is developing and our imagination is our power.

[@ItsHollowfied]

Looking at atoms under an electron microscope looks like pixels on a computer screen when zoomed in on.

[@christianheichel]

No single planck length can hold information.

[@debunkthis]

The Planck length is the smallest length we could measure with out creating a black hole. That is the smallest scale of uncertainty not necessarily the smallest length

[@biggerdaddy123]

Yes. And as Arvin, said, as far as we know so far. Truth be told, there is so much more to learn!! Millenia from now, our current understanding will probably seem rudimentary as cavemen seem to us. Our understanding of the cosmos, energy manipulation and space/time travel will be orders of magnitude, if not on different dimensions and beyond our current concept of time and space. Everything is relative! Secret is to enjoy our present. Our unique present. Arvin is doing a swell job, explaining what we know so far!! Love the playful "fuzzy" reference. Excellent work Arvin. This channel is a rare brain candy. Thank you.

[@debunkthis]

biggerdaddy123 I think he’s doing a good thing but I also think he also misinterprets some of the science. Not often but sometimes, hell im guilty of it as well I’m just clearing it up. If it were the smallest possible length mathematics would be wrong

[@debunkthis]

walentaz it’s a theoretical statement quantizing the schwartschild raidius down it pops out of the math. It also pops out in many other places

[@ongbonga9025]

@Nissim Levy The Heisenberg Uncertainty Principle is not an observer related phenomenom. It is a fundamental law of physics, a kind of unbreakable symmetry. It is impossible to know both the precise location and momentum of a particle, even with perfect measurements.

[@ongbonga9025]

@Nissim Levy Quantum uncertainty is inherent in all wave-like systems. It is not the observer effect, where the act of measurement changes the conditions you are trying to measure. Here's a quote from the wikipedia page... "Thus, the uncertainty principle actually states a fundamental property of quantum systems and is not a statement about the observational success of current technology." en.wikipedia.org/wiki/Uncertainty_principle

[@ramonchiritoiu6131]

If no coincidence, explain that: Divide radius of visible Universe by Plank length and obtained number multiplied with Plank mass will give critical mass of the Universe. If you put in a row Plank particles as long as visible radius of the Universe is, they will form a string heavy as whole Universe in which acoustic waves will travel at speed of light. Tension of the string to prevent colaps must be 10^54 Newton or (c^4/G) where "c" is speed of light and "G" is gravitational constant and it is formally centripetal force of a point heavy as the string, traveling at speed of light on visible Universe circumference.

[@BrianNatonski-wt3mv]

I like turtles😊😊

[@danricci7855]

@2:29 and @3:13 This is my kind of physics class!

[@arturhernadi3555]

2:28 bless you for that

[@OlpyColpy]

Gotta get a name surely

[@MrJetplanemusic]

8 seconds in and I'm like, "Dayum!"

[@Trivedi_Tuesdays]

The transition from giant earthworm to beach girl was insidious.

[@MattJDylan]

Normal person: "plank length is universal" American/English peasant "hOw mUcH iS iT iN iNcHeS?"

[@ffggddss]

That's 6.3·10⁻³⁴ inches. And you're right - most "normal" people *don't* know how to spell Planck. Fred PS: Metric snobs - give 'em a cm and they'll take a km!

[@MattJDylan]

@@ffggddss ah! Nice one dude!

[@darthinvaderzimm]

How much is that in football fields?

[@ffggddss]

@@darthinvaderzimm American football or soccer? If the former, with or without end zones? Fred

[@Solid3d-Melb]

If all of us had teachers who explained science this way , we would all have a PhD under our belt. Beautifully explained

[@AnilJacobs]

Wow, where were you when I was on school some 25 years ago. Brilliantly explained. Can't wait for Part 2

[@christianheichel]

Right! Planck time for part two please!!!????

[@larryslemp9698]

Excellent..!! Best video I've seen on Planck length, and yes, I can now visualize some of this, however prior to watching the video, I could not visualize!! So another way for me to visualize the Planck length size would be to know how many Planck lengths could fit into one square inch?

[@JB-gi5ph]

Hmm, you lost me at beach ball. Gonna need a full in-depth vid on that one.

[@vanderslagmulders]

Ain’t that the truth 😂

[@jonathandevries3840]

This is one of my favorite channels!!

[@scotiancoast3648]

I've watched videos that have briefly talked about these lengths but none have explained it like this. Great video. 🖒🖒

[@ArvinAsh]

Thanks my friend! I appreciate the fact that it is simple enough to understand.

[@jersey-dude]

You always sneak in hot chicks. Love this channel 😂

[@SleepToSound]

As always absolutely fantastic video. Totally underrated channel.

[@jodeg205]

This guy is good at explaining stuff and he doesn’t sound boring

[@marcos_vilela]

Man, i just found out this channel, and it is gold. Thank you very much!!

[@branominal]

Scrolled to the comments at around 2:38 and it's _exactly_ what I expected lol

[@deshsharma2277]

Arvin, can we have your introduction video someday? We want to know your background on science !

[@ArvinAsh]

Yes indeed. I have a short one on my website. But I will make a longer one for sure. Thanks for your support.

[@MrBollocks10]

Yep , me too . Big fan.

[@0nan-Son-of-Juda-Brother-of-Er]

My favorite part was the Big beach ball 2:27 I've got a Plank Length for that

[@marcusrietmann3339]

9:57

[@ominous-omnipresent-they]

HAHAHAHA!

[@pecfree]

3:21

[@0nan-Son-of-Juda-Brother-of-Er]

@sbcontt YT Plank Not Planck Bruh

[@0nan-Son-of-Juda-Brother-of-Er]

@@marcusrietmann3339 9:58

[@harshbhardwaj8221]

Never clicked a notification this fast... 😄 Arvin Ash content is love😍

[@1989Chrisc]

Presenter : Think of the biggest thing you can think of Me : The universe Presenter :

[@magicmulder]

He meant “really imagine the size of” which would probably be a large building. We can’t even properly imagine the height of Mt. Everest.

[@vatanrangani8033]

That beach ball made my plank length unti into diameter of universe

[@intendedviewer922]

This is one of those videos that stay in the back of your head and you think about forever

[@Andy-413]

You underestimate my imagination.

[@ArvinAsh]

That's a good thing.

[@lowiq8176]

Don't try it

[@shreyasuman9f359]

Imaginations never be underestimated bcoz it give rise to innovation

[@w1zz0k12]

Everybody gangsta til aliens roll up with a half planck

[@EduardoMartinez-fk2pv]

Plank length: nothing is shorter than me My average relationship: hold my beer

[@beri4138]

My dick: lol ez klap

[@alex2005z]

Anti-vaxxers lifespan and IQ: noobs

[@waynesmodels2064]

Thanks for posting this interesting piece, I enjoyed it. This may have already been noted, but I didn't have time to go over all 3800+ comments. A small typo at time at time 7:05 showing the elegant and beautiful algebraic depiction of Plank’s constant: the denominator should be length cubed over time cubed vice the depicted length squared over time cubed, as this value should be the speed of light, “c”, fully cubed. The math doesn’t work otherwise. Thanks again for posting and please take this correction in the spirit of making something good even better.

[@ashishkiift]

Another excellent video Arvin .. keep up the good work .. really liked how you presented the graphic on the space-time curve woven in Planck length

[@AluminumOxide]

It’s also possible that a black hole singularity is the size of the Planck length

[@tres-2b299]

Yes

[@thetf8142]

Funfact: you’re closer to the size of the observable universe, than you are to the Planck length Multiple times over

[@yggdrasil9039]

2:30 "All across America" lol I like the way you put emphasis on that point with the visual at the same time. Yes, physics is sexy.

[@theodoreroosevelt6439]

"If an atom were the size of the earth, a planck length would be the size of the head of a pin." My head just exploded...

[@ArvinAsh]

Watch all the way through. Planck would actually be much smaller than that!

[@fufun4me]

He said it would be the size of a proton.

[@tunggulsilaban4355]

@@ArvinAsh What kind of thing or what is it that has a planck length?

[@ArvinAsh]

@@tunggulsilaban4355 It is the smallest measurable distance in space-time.

[@tunggulsilaban4355]

@@ArvinAsh I mean is there anything that has Planck Size?

[@JRay2113]

Best science channel by far

[@lordkresh]

I stopped thinking about the beach ball almost immediately.

[@stevo187X]

I love your videos, surely Joe Rogan will have you on his podcast one day, I can’t wait, keep up the great work Arvin.

[@JeffreyCVogt-ch9yf]

Lol

[@theodor12]

them: a planck length is the smallest length in the universe me: 0.5 planck lenghts

[@TsukiRaiki]

2:29 ah yes, the beach ball. critical to science indeed

[@fos8789]

2:28 yeah, I instantly forgot everything you said before that

[@pathagas]

i have to praise your narration and script-writing ability. it’s a real skill to get someone so intrigued in a topic like this

[@greta8849]

what about a quarter planck length? OOOOOOOHHHHH YOU JUST GOT LIT UP, CUH

[@matkosmat8890]

Thanks for a nice video! The eye candy was unexpected and appreciated :)

[@mybluemars]

When I was a kid, I used to think that size, length and distance were all just variables in our perception. Thank you for making me think like a kid again!

[@donichiro]

oh

[@sunlessfiber5106]

oh

[@clintonlefort2004]

I come from a non-scientific background but still am fascinated by measurements as the Planck Length. I've applied my best knowledge to this and have not, until watching your explanation, felt like I have a very good grasp of actually how small a length the Planck Lenght is. For example, recently I measured the dimensions of my room (12'X15'X9') = 45.9 Cubic meters; when 45.9 cubic meters is translated to Planck volume it amounts to 1.087239737546e+106. The calculator used tells me that "The Planck volume is a base unit of volume in the system of Planck units, equal to 4.2217 × 10⁻¹⁰⁵ m³. The Planck volume can be defined using fundamental physical constants and has the dimension of volume L³ where L - dimension of length." All of which you explained in Pt I of this video-thanks. According to your explanation, it seems that even in my own room, in one cubic meter, there are more Planck units than there are grains of sand on the Earth. (I know there are many more magnitudes smaller than this but at this point my non-scientific mind kind of took a vacation. Even if I reduced my room size to (1"X1"X1") equalling 0.0000156 cubic meters, I still arrive at this 3.695193879243e+99 Plank volume. On the other hand, if we consider that theologians tell us that in God there is no motion, since God is what is called Immutable, and Eternal, meaning there is no before or after in his Being. This means that on this level the Government of the Universe (which I call my 1"X1"X1") 0.0000156 cubic meter room has this 3.695193879243e+99 Plank volume which is governed by a BEING which is IMMUTABLE and ETERNAL, is equally fascinating to me (though not as fascinating as for someone who truly understands. Anyway, I'm interested in watching part II. Thank you and you deserve definitely a few THUMBS UP for this explanation.

[@timoms1748]

Crazy

[@mcjamesyt919]

I AINT READING ALLAT BUT WE UP 🗣️🗣️🗣️🗣️🗣️🗣️🗣️🗣️🔥🔥🔥🔥🔥🔥🔥🔥🔥💯💯💯💯💯💯💯

[@larryslemp9698]

I assume you were just talking some mumbo-jumbo!?

[@densealloy]

Excellent break down and use of analogous example that people can relate to.

[@TraumaER]

3:21 I like learning this way. 😍

[@dirt007]

Poor decimeter. It never gets any love from anyone.

[@GFKCEG]

"the biggest thing you can think of" Me, a man of culture: 0:08 biggest indeed... *Pause*

[@brianswelding]

I had to back up... is that CGI?

[@ep238]

3:18 would make more sense

[@petetong9725]

Me pauses.. then thinks John Holmes

[@starkillerbeats420]

Indeed

[@GFKCEG]

@@ep238 you need to measure that personally and bring that sense to us

[@emredil754]

We know from computer technology the smallest unit is one bit of information. If we are in a simulation there is needed a smallest unit being Planck length for space. Similarly for others like time, energy , etc. I believe that the Planck length is the smallest quantity to start the simulation from nothing physical.

[@lsdap1969]

I've read an article that there aren't enough electrons in the universe to make a simulation plausible.

[@emredil754]

@@lsdap1969 As I understand this simulation is not about any materialist existences. Only the existence present is conscious, then the other things we see and percieve are in the simulation. Namely, conscious creates the universe.

[@lsdap1969]

@@emredil754 But this would suggest that consciousness is a non material entity and tbh I can't comprehend how this is supposed to work... Can you link me to any giod read regarding this topic?

[@emredil754]

@@lsdap1969 Tom Cambell, My Big Toe, book. You can find the book from internet. Here is a youtube comment on book by himself, kzbin.info/www/bejne/oKqUZoGti8ubqMU

[@Hambone3773]

Smallest unit as determined by the actual measuring sticks we have...speed of light, etc

[@kevinwilkinson2972]

Absolutely fascinating. Thanks for this video. I always wonder if other dimensions can be found beyond the planck length

[@MrPeplonski]

7:06 length below division should be ^3

[@CadmusCurtis]

Hey I'm new to your channel and want to say thank you for all the effort and clear explanations! I'm trying to learn so much about this kind of stuff, but when you don't know what any of it means it's easier to have someone like you explain it in semi simple ways that make sense. Great work sir I'm now subbed and excited to see what other videos you will release!

[@soccerking710]

You a real one for the honesty.

[@fgvcosmic6752]

Remember: It's not the smallest POSSIBLE distance Its the smallest MEASURABLE distance

[@xiupsilon876]

It's not measurable or has anything to do with measurment. It's the smallest possible distance with known physics, as in space itself has to become grid-like at the Planck scale.

[@sunnycareboo8924]

physics only concerns itself with the measurable. Physics cannot describe anything not measurable.

[@xiupsilon876]

@@sunnycareboo8924 In my view, things that are theoretically immeasurable are superstition. Even consciousness is measurable, theoretically.

[@xiupsilon876]

@@cq33xx58 The universe doesn't care about your instincts or your restricted sense of aesthetics

[@sunnycareboo8924]

@@xiupsilon876 I really like that topic. It makes sense to me that if our conscious experience can be quantified into units of information, and information is conserved, then we should be able to tell how much consciousness a thing has.

[@hoenheim94]

I was taught in undergrad that most viruses were fairly specific to groups of animals, because they require an interaction with a specific surface protein to transmit their genetic material to the cell, is that not the case?

[@ArvinAsh]

Yes, it is correct. I should have been clearer - most viruses that infect your human body are harmful, unlike bacteria.