I guess this is how we should teach our children what is left and what is right. "Simply build an particle accelerator".

Me: "turn to the left" Alien: turns right Me: Jimmy we've discussed this already. Do we have to visit a particle accelerator again?

"simply, build a particle accelerator."

1:18 "Not knowing left and right could impair intergalactic culinary relations" This is of upmost importance.

Humans: Turn left Anti-Alien: Turns left Humans: no no no... the other left.

We're having a hard time finding evidence of alien life in general and MinutePhysics over here is discussing the ramifications of addressing left/right to anti-aliens.

3:57 "simply build a particle accelerator" what a flex

* Alien visits earth * Alien: "Du you know the way to the White House?" Human: "Well, do you know kaons...?"

I understood the anti-version of this video, so when I watched it my understanding was annihilated

minutephysics: "simply build a particle accelerator" me: ?!

"So you guys just have to look at the 20.1% decay" "Oh.. got it! 1.02% thanks!"

7 year old me: Mom how to distinguish left from right? Mom who also happens to be a physicist: Just build a particle accelerator...

_"Everything mirrors perfectly except for this one thing"_ ... ... ....why....?

I don't think we have ever produced an antimatter uranium atom. So, it's a prediction that anti U-239 would produce right handed anti-electrons that needs to be tested and verified, not a fact. That's important, after all, the CP-symmetry violation was a shock for physicists in the 1960s.

"Simply build a particle accelerator" Can I get one at Ikea? And how many part(ticle)s does it consist of? Must be one hell of manual.

Perfect. Now that I know how to tell matter from antimatter, I'll never run the risk of accidentally annihilating myself, so long as I have a FRIKIN PARTICLE ACCELERATOR IN MY POCKET!

1:01 I wish the text would stay longer in the window. I don't mind hit pause while watching the video, but it would be nice to have a longer timespan to actually be able to hit pause.

"Enter the K-on." And thus, moe was scientifically proven.

*Scientist A:* _"Do you know what's the difference between Matter and Anti-matter?"_ *Scientist B:* *shrugs * *Scientist A:* _"Neither do I, but it doesn't matter."_

Whenever I feel burnt out and feel like science has become tiring, minute physics seems to always pull me back in His explanation and his videos make me feel at home (at my sciencey home) Just sharing

God might play dice, but he's really particular about his chirality, it seems.

When minutephysics starts talking about K-On!

Hypothetically, when signalling aliens, you could polarize the carrier signal and use that as a reference for clockwise or counterclockwise and thus left and right

This reminds me of a story Feynman told in his 1964 Cornell lecture series on the same connundrum (Symmetry of Physical Law). He didn't call it the Ozma paradox or present a solution, but the way he tells it is so great.

What i came here for: The Ozma Problem What i understood: 🅰🅽🆃🅸 - 🅰🅻🅸🅴🅽🆂

"Simply build a particle accelerator" want a coffee with it?

This is a tremendous "explainer" video on CP violation. Thank you!

On a half related topic: trying to define left and right leads to an interesting concept: rotational directions. We only have names for 2 rotational directions, on the XY axis. I'd say XZ rotation is leftwise and rightwise, and YZ rotation is forwise and backwise.

"Simply build a particle accelerator" -MinutePhysics 2020

The topics you talk about are always about something big yet some how you never fail to explain it in a simple and easy way to understand. Thank you so much.

I like to think that there isn't actually a difference between the amount of anti-matter and matter particles in the universe, but rather the observable universe just happens to be in an area almost entirely made of up matter, and that there are also places made up almost entirely of antimatter, similar but opposite to us.

Just as I think I figured out how the universe works, you come to offer a new point of view. You always explain something high above in the most intuitive way.

How do we know about the way anti-uranium decays? The largest anti-nuclei created so far as far as I'm aware are anti-helium.

I was in the 7th grade when I first saw one of your vids. Righ now I'm in my last year of college. Your videos still bring me that sense of nostalgia ❤️

"What's antimatter?" "It doesn't matter." "Yes it does. I want to know." "know what?" "Antimatter." "what about it?" "I don't see." "That's right." "What's right." "No matter."

I was looking for Civil Protection Violation, that one song but this is cool too.

1:03 Potential impact on Intergalactic culinary relations 😹😹😹👍🏻💯

Counterpoint: I'm never going to ask someone made of antimatter to make me pie so i guess you could say this problem doesn't.... Matter

This issue has bounced around in my head since AP physics, 33 years ago. Thank you. I can rest now.

"Simply build a particle accelerator.." Sounds easy enough

Last time i was this early the internet provider were defying math

What if the opposite-handed anti-aliens were also moving backward in time?

"you definitely dont wanna shake EITHER hand of an alien made of anti matter".... love it dude, love it i cant stop laughing🤣

*simply* Build a particle accelerator. Hold up, let me call Stark Industries.

Ah yes how do I tell the alien I am talking to how to bake my favorite cookies

Who tried to rub the spot on his paper off your screen? Lol

Lal, for me it's the first video to call the CPT violation a good thing.

your channel is amazing

Me watching this video: “Ok i get it.” “Ok i get it...” “Nevermind”

0:23 I always thought the writing behind McGonagall was in Ancient Runes. Never knew it was mirrored. Huh.

So, minute physics is now making more than a minute physics. Awesome. :)

Great videos, short and sweet

Who would've thought that anime girls could help us communicate with aliens

"Enter the keion" Yui saves the day once again

dear Henry, it's been 11 months since you made a video that's actually about physics, we miss it

This is so interesting!! I want to know more!

Alien: which direction is left? Humans: You see Mars? Thats to the left of us

The fact that he didn’t say positron but said anti-electron bothers me.

really the best physics channel

Enjoy ur vids alot thanks for making them

3:14 Enter the K-On! *Digibro would like to know your location*

I find it amusing that this video avoids words like chirality and positrons when that is exactly what it is talking about.

Good thing you made this video, I thought I'd have to explain this to my family, because of course I could. Good save.

I LOVE THIS CHANNEL

This feels a little like an orientation video for SCP foundation employees.

At the pi-timestamp: not to be confused with the K-On!

When I was much younger, the way I remembered what "Left" is was "The general direction you need to run towards in Zillion after issuing the destroy base command on the mainframe". If only I had back then a particle accelerator and the knowledge presented in this video...

I always enjoy your drawing !

I was looking for CP violation from half life 2, but I learned about this instead

Minute physics: simply build a particule accelerator Me: instructions unclear watched K-on!

been watching for awhile... are you a teacher? you explain things really well

Well, you could say that your right hand is the hand that comes first if you were to start at your back and rotate around your body counter clockwise relative to a clock flipped to the horizontal with its face facing up or facing towards your head positioned at your waist.

Got my particle accelerator, which way should i turn the screws to assemble it?

I think the fact that we could communicate at all would mean that we must have been able to solve similarly hard problems for defining our words Also TIL that CP Violation is another title of something in Half Life that is actually a real physics thing

Thanks for this nice video 👍

For the past two years, I have been studying an area of math known as googology. Googology is basically the study of very large numbers and the notations that is used to express them. When you study googology in depth, you can see that the so-called scientific notation which we usually use to express large numbers is actually incredibly weak in comparison to many of the commonly used notations in googology such as Knuth's up-arrow notation, fast-growing hierarchy, Bird's Array Notation and Bashicu Matrix System, although it may not seems weak at all to an average person. This is mainly because we don't need numbers much larger than those that can be made using exponents in real life. For example, the mass of Sun is approximately 2*10^30 kg and the number of subatomic particles in the universe is approimately 10^80. Below I will show you the formal definition and some examples of expression in Knuth's up-arrow notation: a^^^^...^^^b with n uparrows = a^^^...^a^^^...^^a^^^...^^a... ...a^^^..^^a with (n-1) uparrows between each successive a's Where a^b is the same as a raised to the power tower of b First, we will take a review of addition, multiplication and exponentiation. We had all studied in school that addition is repeated counting, multiplication is repeated addition and exponentiation is repeated multiplication, mathematically: a+b = a+1+1+1...+1 (repeated b times) a*b = a+a+a...+a (repeated b times), and a^b = a*a*a*a...*a (repeated b times) Now, we will start with the double up-arrow operator, which is better known as tetration. a^^b (read this as "a tetrated to b") = a^a^a^a^...^a (b times) (a power tower of a's b terms high) Keep in mind that exponents are always right-associative, so a^b^c^d is the same as a^(b^(c^d)) For example, 2^^3 = 2^2^2 = 2^4 = 16 2^^4 = 2^2^2^2 = 2^2^4 = 2^16 = 65536 2^^5 = 2^2^2^2^2 = 2^2^2^4 = 2^2^16 = 2^65536 = 10^(log10(2)*65536) using rules of logarithm = approx. 2*10^19728 (a number WITH 19729 DIGITS!!!!!!) 3^^3 = 3^3^3 = 3^27 = 7,625,597,484,987 (approximately 7.6 trillion for short) 10^^^3 = 10^10^10 = 10^(10 billion) = 1 followed by ten billion zeroes Now do you see how powerful tetration is in comparison to scientific notation? But that's not the end of the story. Just like how tetration is repeated exponentiation, pentation is repeated tetration, which is normally denoted as triple up arrows (^^^) In summary, the n arrow operator is repeated (n-1) arrow operator After that, I suggest you to learn the definition of fast-growing hierarchy, which is basically like this: f_n(a) = (f_(n-1))^a(a), when n is a successor ordinal, or in other words, f_(n-1)(f_(n-1)(...(f_(n-1)(a))...)) (nested n times) When n is a limit ordinal, f_n(a) is defined as f_(n[a])(a), where n[a] is the n-th element of the fundamental sequence of the ordinal n For the definition of successor and limit ordinals, you can search it yourself in Googology Wiki Now, here's an equation for you. Given that 1/f_x(100) is the amount of DNA I inherit from my mom, try to find the ordinal x. The ordinal x here is known as my DNA ordinal Here's the approximate value of x in Bashicu Matrix System: (0,0,0)(1,1,1)(2,2,2)(3,3,3)(3,3,0)(4,4,1)(5,5,2)(6,6,2)(7,7,0)(8,8,1)(9,9,2)(10,9,2)(11,9,0)(12,10,1)(13,11,2)(13,11,2)(13,11,1)(14,12,2)(14,11,1)(15,12,2)(15,11,1)(16,12,0)(17,13,1)(18,14,2)(18,14,2)(18,14,1)(19,15,2)(19,14,1)(20,15,2)(20,14,1)(21,15,0)(22,16,1)(23,17,2)(23,17,2)(23,17,1)(24,18,2)(24,17,1)(25,18,2)(25,17,0)(26,18,1)(27,19,2)(27,19,2)(27,19,1)(28,20,2)(28,19,1)(29,20,2)(29,19,0)(30,20,1)(31,21,2)(31,21,2)(31,21,1)(32,22,2)(32,21,1)(33,22,2)(33,21,0)(34,22,1)(35,23,2)(35,23,2)(35,23,1)(36,24,2)(36,23,1)(37,24,2)(37,23,0)(38,24,1)(39,25,2)(40,25,2)(40,25,1)(41,26,2)(41,22,1)(42,23,2)(42,23,2)(42,23,1)(43,24,2)(43,23,1)(44,24,2)(44,23,0)(45,24,1)(46,25,2)(47,25,2)(47,25,1)(48,26,1)(49,27,0)(50,28,1)(51,29,2)(52,29,2)(52,29,1)(53,30,0)(54,31,1)(55,32,2)(56,32,2)(56,32,0)(57,33,1)(58,34,2)(59,34,2)(59,34,0)(60,35,1)(61,36,2)(62,36,2)(62,36,0)(63,37,1)(64,38,2)(65,38,2)(65,38,0)(66,39,1)(67,40,2)(68,40,2)(68,40,0)(69,41,1)(70,42,2)(71,42,2)(71,42,0)(72,43,1)(73,44,0)(74,45,1)(75,44,0)... ... For the definition of Bashicu Matrix System, you can search it up yourself in google So can you please help me to analyze my DNA ordinal?

Addendum: The aliens have an antimatter Samuel R. Jackson.

3:14 Light Music Club? Hehe :3

This video was so educational

Please do a video on the strong CP problem! :)

Can't believe that one anime about cute girls doing music things is the solution to an intergalactic communication problem

am i the only one who was thinking of CP Violation from HL2?

At 0:23 we are seeing the right side of Maggie Smith's face on the left side of the frame in the bottom flopped shot, but that means that what appears to be the left side of her face on the right side of the frame in the above original shot is actually the right side of her face. Seems like a trivial detail, but then you have to realize that a camera takes a mirror image when it captures a shot (why the left side of an image is actually the ride side of the object in the image), however, if that image is further mirrored it does not reverse the mirroring effect so a mirror image of an object will forever have reversed symmetry making it essentially a glimpse of a parallel reality that only exists while it is being observed. In other words, when you look in the mirror you can see your parallel doppelganger but you can never see "yourself" because your reflection shows your features on the opposite side of your face and body from the side on which really are really and from the side that everyone else sees.

I remember Feynman’s “Six not so easy pieces” where he points out this problem. However he didn’t mention the last solution with K0, and I’m wondering if that asymmetry has been discovered after Feynman’s lectures.

K-On! gang, assemble. My favorite is Mio. Whether mirrored or anti-matter, doesn't matter.

"Simply, build a particle accelerator" LOL

I've never seen an explanation (at a layman's level) of how we know there is more matter than antimatter in the Universe. I get that we could observe annihilation if matter and antimatter were encountering each other, but if galaxies (or whole superclusters) were segregated into matter and antimatter galaxies, and being pulled apart by the expansion of the Universe, how would we know which were which? Would an antimatter star (or galaxy or supercluster) be observably different from a matter one?

I am impressed by all the small things in the universe humans have learned so many facts about. Like the probability of tiny things decaying into other tiny things.

20.1% vs 20.3%? Is that a significant difference? What is the likelihood that that difference arises instead from chance? How many experiments have been performed in human history? What portion of them are the ones that give is this difference in numbers?

thanks youtube, i needed to know this for... science and...stuff

CP violation measurements were a part of my master thesis

Delightfully, while flipping left/right and matter/antimatter can be distinguished, if you flip them and also flip backwards/forwards through time, it's fully symmetric again. Fortunately, this one isn't a problem for potential extraterrestrial communication, since it would be impossible to communicate with time-reversed aliens anyway; every new communication we would try to make with them would, for them, before any other communications.

3:56 “ SIMPLY build a particle accelerator”

How do we produce a mirror image experiment? How do we find a uranium nucleus which is mirrored? And where will the antimatter aliens live? A void?

I have a question, when things spin, they do so along/around or relative to an axis. Based on what axis is particle spin measured? The direction they are moving?

This is the ultimate solution without a problem :) I like it.

@minutephysics i have a Question, how do we know, that K-ons in an Antimatter particle Accelerator behave like in a normal particle Accelerator?

"CP violation" (flashback of Combines trying to kill me in sewers)

I heard you talking about violating the CP symmetry, and that talk of symmetries reminds me of the best, if theoretical, symmetries ever- supersymmetry (SUSY)

Great, now I have to spend about ten hours thinking about this.