i just wanna know if the germans ever got their lightbulb

edgarallan notpoe Nope the EU banned them in the end. No more incandescent light bulbs for us.

tjpld why

edgarallan notpoe Because they're inefficient.

tjpld who, the EU or the lightbulbs? BAM!

but how did quantum physics originate from this idea?

@@fouadtabby4885 it gave a sense that light can have particle like properties and can work in discrete amounts rather than like a continuous wave

@@thousandminusseven3889 but quantum physics is about atoms not light, as far as I know. that is why I'm confused

@@fouadtabby4885 well, it's not. It's about nature at the smallest scale, starting with fundamental particles, photons (light) being one of them. It also deals with atoms, and our current model of them comes from quantum physics, but it's not the main or only thing quantum physics studies.

@@Itamaxification Thanks alot! that was very useful

عملتي اي❤😂

@@user-xz1ct7nw5m تجاره انجلش عين شمس🫡😂❤️

واحدة معاكووو

معاكم 😂😂❤

معاكم ايه بقا انا خلصت ربنا معاكو انتو😂😂😂😭

2024😂❤

منورين

2024دفعه

2024😂😂

😂😂😂

who said they understand it hahahahaha😂

They don’t understand it and explain it even worse

Haha

robbie Basically light is like a little car. It needs it's little gas as it leaves it's source garage. Except this car does not stop for gas along the way ever. If that were so shining a flashlight at someone would cool then down or freeze them. See what it is? But light doesn't go by taking energy with it.

Are you joking!!!!!

Absolutely

Same here✋

It’s not your fault, they explain it horribly

@@hosoiarchives4858 they explain it magnificently you’re just dumb

@@hosoiarchives4858 so what's the best way to learn quantum mechanics? Any suggestions?

​​@@techwizard8214t depends on how much you want to know. If you only want to know the basics, videos on youtube are 1 way to go. If you want to know more than just the basics, you could study physics. Edit: This documentary explains quantum physics really well for beginners: m.kzfaq.info/get/bejne/f7mUdaSXkt_XeWQ.html

He should have added the tortoise and the hare/Zeno's arrow paradox as well, this cookie thing is kind of irritating... it's not a topic you can 'understand' like other topics, this 'packet' of energy notion leads directly to the Measurement Problem which is the most fundamental 'contradiction' facing modern physics. So to hear Üter Zörker gleefully talk about cookies as if you're an idiot for not understanding is kind of irritating.

64 people agree

***** That's a lot of empty kitchens

lavaskater im the 76th liker, I liked bc wynaut?

Eat in the dark.

@@pillettadoinswartsh4974 me:eating in the dark Mom: Hola!!!!

انا من طلاب اليويتوب وجي من المذكرة بتاعت محمود مجدي 😂 علي فكرة نو منزل محاضرة ٢ يعني مش مراكمة ولا حاجة

@@midogaming2141 لا منزل ٢

hello how u doing

:(

1 / infinity = 0.000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...

it's whatever you define it to be, just like everything else in mathematics.

1 / infinity is actually 0. because you will never find the 1, because it's infinite.

actually it does not exist 1/infinity or 1/0. what it do exist is the limit of 1/x when x tend to infinity or zero. it sound like the same but it is not.

+jaaackay ^bitch

+The sky is falling because tomatoes are really annoying. Rude.

+The sky is falling because tomatoes are really annoying. I like ur name

Ray Kay it's an example to explain what is NOT going on. It's kinda confusing indeed

Just you

@@uniqhnd23 love to hear your stupidity

@@poppyflorist Can you rephrase that with a bit more context?

The analogy is used to explain the issue Planck came across prior to the development of his own theory. Steven Hawking breaks down this issue quite well: ‘According to laws we believed at the time, a hot body ought to give off electromagnetic waves (light, radio X-ray etc) equally at all frequencies. For example, a hot body should radiate the same amount of energy in waves of frequencies between one and two million million waves a second as in waves with frequencies between two and three million million waves a second. Now since the number of waves a second is unlimited, this would mean the total energy radiated would be infinite. - an obviously ridiculous result’. A brief history of time, Chapter 4, 62.

It made sense to me, and this is actually the first time I've understood why different temperature objects glow different colors.

Much of what it said was outright wrong. Infinite sums are not always infinite. Why do the cookies need to be shared? Why is there a relationship between the energy carried away and the type of light that does the carrying? Can't all energy be carried only by green photons and the problem be solved?

why did you try to answer these questions when you clearly can't?

the questions that this video seeks to answer are, "why does fire look the way fire looks?" "Why does it carry away more energy in the green and yellow band than in higher energy bands?" and "why is the total energy carried away finite?" The answer given is wholly unsatisfactory, and your defense of that answer was, bad english or not, also wholly unsatisfactory. According to the video, there is no reason why all of the energy that the the electrons in fire lose could be lost on the green wavelength, and the total energy lost could still be infinite. Planck's retooling of the model overthrew a misconception that no one watching the video has. In fact, throughout history, the only people who have ever had reason to believe that a black body should radiate away all of its energy are the classical physicists that invented the original model of black body radiation. In order for this video to be meaningful in any way, you first have to explain to people the model that predicted that every object instantaneously radiated away all of its thermal energy, which the video does not do.

Yes

O Boże nie ;-;

Are you *CERTAIN* that there was nothing about you! Hahahaha hooooo heee What am I doing with my life?

+cesar leon ha ha

+cesar leon probally the best science joke of the year :D

Vincensius A and was hungry

@Vincensius A: In other words, after this video you tossed your cookies. BAM!

haha

4 years old and 2 million views

Why is this the top comment on a scientific video that came out 4 years ago?

Ailuropoda melanoleuca Nineoneone MY mobile displays it as 4:20

Goku Norris I was just about to comment about that LMAO

how life is going to you . have a great day

Really? That was a break through moment for me.

You're just dumb lol

It feels to me that if you understand quantum mechanics, that can help you to understand the cookie metaphor. But I'm not sure if it works the other way around.

@@uniqhnd23 not everybody is smart as you at least they are trying to learn

I think it was to explain why the higher frequency light is not emmited by the light bulb.

Bc its bullsht lol

"feel" being the operative word, I feel (?)

my dream is to live forever so i can learn everything

also yeah necro

Any practical applications to use with this knowledge? I mean real ones, not just "blah blah everything is based on this and would not work without".

+ryan bresnahan no they are not ACTUALLY heated to that temperature. it just says that it would be an ideal temperature so that most energy is converted to light. but this doesnt actually happen, thats why bulbs are considered as inefficient.

Swarnav Parida Do you know what temperature they are? I know a majority of the energy is converted to heat not light but I have no clue how hot they are.

+ryan bresnahan Looking around it seems less than 5% of energy consumed is released as visible light. Also it seems that the old tungsten wire bulbs actually did heat the wire itself to 2,000 to 3,300 K (3,140 to 5,480 °F) As for the newer gas bulbs, I have no idea.

Christian Cohn Well you pretty much answered my question! I knew they used tungsten for the filaments for that reason, but it still is surprising that they were that hot!

+ryan bresnahan The Kelvin scale needs some explanation. Imagine a piece of black metal. As you heat up the metal, it will eventually start to glow. At 1500 Kelvin it will be red like a candle, and at around 7000 Kelvin it will reach blue. That's the theoretical way to think about colour "temperature". A light bulb doesn't get nearly as hot (a few hundred degrees). So when you hear "the lamp is 3200K" it just means it's the colour that a 3200K hot metal piece would've been.

The thing is, it's basically the Conan Doyle theory: everything else is impossible. We know there's an explanation. Through experimentation, we can eliminate certain explanations. The problem is, we have eliminated the simple ones, this complicated stuff is all we've got left. It doesn't make sense in the way we think about physics on the macro scale but it's all we've got that actually aligns with the data

well most investors, physicist with discoveries to their names are kinda crazy and extremely un-social, just look at tesla, newton etc, both of them never liked people and were declared crazy, arrogant, anti-social even by their families..

Interesting to note is that the surface temperature of the sun is in fact ~5800K

Please don´t arrest me I swear the Fourier series screwed up itself.

The universe doesn't expand, the objects within it expand.

Pika Gaming No, The universe expands and the objects get farther apart

Loojee715 Yeah, that's what I Meant.

Pika Gaming But that isn't what you said

1) yes, all objects emit energy (unless they're at the absolute 0K point) in the form of light, the hotter the object, the smaller the lightwaves, which gives a different colour of the electromagnetic spectrum. 2) The more energy an object has, the hotter it becomes and the higher the frequency of the light waves emitted. The amount of heat won't decrease, but increase as you put more energy into an object. 3) temperature is actually caused by the "jiggling" of atomic particles, the more energy they have, the faster they jiggle, thus the hotter they are. The reason objects give out both light and temperature is one of the rules of thermodynamics, which say that there is always a loss of energy. There are no objects that emit 100% of their energy in light, there is always some heat generated as well, which is the loss of energy. Please note that I am not a scientist, if any of my answers are wrong, don't hate on me, but let me know in the nicest way what should be the right answer =)

LORDtullamore Great answers, everything seems pretty much dead on (I finished a class on stuff like this in the Fall, so I hope I'm correct in saying that). The term, jiggling, is still probably my favorite colloquial term for something scientific! XD

LORDtullamore I would suggest that most thermal energy is transmitted as light. "Heat" in an engineering/physics sense is a transfer of energy. The (relatively) long-range interactions between atoms are mediated by photons (pretty much everything but gravitation and inter-nucleus forces). In a physical solid, the atoms are close together and sharing/interchanging electrons (an expression of photon interaction). In diffuse systems (gasses) the interactions are longer-ranged but driven by electrical force (photon) interactions. Nuclear heating (energy transfer) does involve neutrons, which are electrically neutral particles and can transfer energy by other means (gluon interactions), so the heating of stars and hot planet cores is way more complicated [and beyond my solid grasp]. But for the basic case of, "I put a hot thing against a cold thing," or, "I put a hot thing near a cold thing in a closed system," the answer is ultimately that the energy is transferred by photons.

Mark M Way confused here. What do you mean exactly by electron sharing's being an expression of photon interaction? And electrical force interactions (I assume you're talking about Coulombic forces) are photon interactions? Anyway you sound pretty knowledgeable so maybe you can answer a question that's been plaguing me for a while. So I understand that temperature is a macrostate expression for average kinetic energy of all particles in a system. Further, I understand that rotational and vibrational energy levels of molecules can be excited by microwave-IR frequencies of light. From a classical mechanical perspective, it makes sense that mechanical collisions between particles would also produce vibration and rotation in molecules which could then dump that rotational/vibrational energy in the form of light, but that light emitted would again be microwave/IR. The difference between rotational/vibrational energy levels isn't high enough to release visible frequencies of light. It's not until you start messing with electronic energy levels that you should see visible light, right? The fact that blackbody radiation occurs must necessarily mean that excitation of electrons to higher orbitals is somehow a consequence of higher average kinetic energy of particles in a system, but I just don't understand how the two could be directly linked. Am I too attached to the notion of understanding things at the nanoscale from a Classical Physics perspective? Surely there is some way to rationalize this phenomenon using the laws of mechanics and E&M.

Mario M ......A great scholarly reference on this is Thomas Kuhn's book BLACKBODY THEORY AND THE QUANTUM DISCONTINUITY.

That's funny, because no one REALLY understands quantum mechanics. You must be the smartest person to have ever lived.

are you serious? Holy crud. How do I proceed from here then? Call Mensa? I feel like I owe a debt to humanity.

***** I assure you I am not being cocky, I just totally understand everything about quantum physics because I watched this 4 minute video. Is that so hard to believe?

He says "where did..."

It came from Jamaica, right near the beach mon...

بص اعملها من عندك

هتلاقي علامة فوق عالشمال فالفيديو مكتوب فيها cc

هتدوس عليها و هتدوس علي الترس الي جنبها و تختار الترجمة عربي او تلقائيا عربي

haha well done!

I think Neil can do better...he lost me at the cookies...

Nice.

+Legal Fiction Natural Fact whatever

WTF?

Not A Physicist, but I agree that there must be a practical limit on the wavelength of radiation in the classical sense (as wavelength is proportional to the inverse of the energy). There is probably a limit to the amount of energy in the universe. As far as quantum mechanics goes, I could not possibly speculate.

I think it has something to do with the planck length and how the wave cant be smaller than the size of the photon itself

Maybe. There are length scales where quantum electrodynamics goes head-to-head with general relativity, which is the planck scale mentioned above. Since quantum mechanics and general relativity don't play nicely together that might mean photons may not exist with smaller wavelengths but we don't know because we don't know what's going on down there. As far as the physics we know about is concerned, there is no such limit. Very High Energy gamma rays have been found in cosmic rays, and they can have a higher energy than LHC protons.

الترجمة مش مقصرة

I really learned here something even though I thought I already knew quit a bit. But are you saying that these analogies are incorrect or misleading? Could they make people think they get it while they're actually not? Are really important things left out (from a conceptual point of view, not mathematical perse)?? I don't know enough to make this judgement but if you can, please elaborate :)

What does an infinite amount of waves have anything to do with the portions of energy they can carry? If there is an infinite number of waves, which is an abstract concept anyway, it doesn´t matter how big your energy packs are, anything you multiply with infinite becomes infinite.

Stefan Djusic Your comments made me think this over and indeed some things make no sense. He first explains the problem with infinitesimal small waves and infinitely many of them (the problem you mentioned) and then all of the sudden the wavelengths aren't infinitesimal anymore because waves of a certain wavelength can only carry a specific amount of energy. But if this is the case, then why can't an object which is radiating black-body-radiation just sent out a single photon with a wavelength such that the energy it carries exactly matches the total thermal-energy the object has, thus freezing your thee instantly. He mentions no reason why such an object radiates waves of a whole spectrum of frequencies.

I just realized that there are a lot more problem with this video and that we can safely deem these things as features of quantum physics and be done with it...

Wow, an actual critically thinking youtube commenter :D

So not! I can imagine "package". I cannot imagine "photons". That, to mee, is like "glbrfsnsmdry".

Well that is to be expected from a video about the ORIGIN of Quantum Mechanical Theory and not a video explaining the theory...

I very much liked learning about Max Planck's lightbulb project. Knowing about that, it is easy to see why he wanted to calculate the radiation energy emission curve for any given temperature.