Physics Explained
Physics Explained
  • Видео 18
  • Просмотров 9 784 437
What is the Heisenberg Uncertainty Principle? A wave packet approach
In this video I would like to answer a simple question: according to quantum mechanics, how do you describe a freely moving particle? It sounds simple, but what we will discover is that by attempting to answer this question, we will actually uncover one of the most profound ideas in physics, Heisenberg’s Uncertainty Principle, which tells us that it is impossible to simultaneously know where a particle is located, and how fast it is moving, implying that there is a fundamental limit to our knowledge of the physical universe. It is a principle that lies at the heart of quantum mechanics, and it has revolutionised our understanding of the fundamental laws of physics. So, buckle up, and get ...
Просмотров: 271 563

Видео

What is Quantum Tunnelling?
Просмотров 240 тыс.2 года назад
This video explores one of the most fascinating and esoteric properties of quantum mechanics: quantum tunnelling. The video begins by explaining an apparent paradox involving alpha decay, and then goes on to show how the theory of quantum tunnelling can provide a solution. The Schrodinger equation is solved for a rectangular barrier, and the tunnelling probability is calculated. A simplified mo...
What is the Schrödinger Equation? A basic introduction to Quantum Mechanics
Просмотров 1,7 млн2 года назад
This video provides a basic introduction to the Schrödinger equation by exploring how it can be used to perform simple quantum mechanical calculations. After explaining the basic structure of the equation, the infinite square well potential is used as a case study. The separation of variables approach is used to solve the Schrödinger equation and Born's probabilistic interpretation of the wave-...
What is the Chandrasekhar limit for White Dwarf Stars?
Просмотров 230 тыс.2 года назад
This video provides a simplified step by step derivation of the Chandrasekhar limit for White Dwarf stars. After briefly discussing the history of white dwarf stars, an overview of electron degeneracy pressure is provided. Using a combination of quantum mechanics and Einstein's theory of special relativity, the Chandrasekhar mass is derived. The video ends with a discussion of the conflict betw...
Quantum Mechanics and the Principle of Least Time
Просмотров 166 тыс.3 года назад
In this short video I would like to tell you about the pioneering work of Pierre de Fermat, who discovered that light is the laziest object in the universe, always preferring to take the path that minimises the amount of time spent travelling between two points. But perhaps what is even more exciting is that Fermat’s principle lies at the heart of one of the most successful scientific theories ...
Deriving Hawking's most famous equation: What is the temperature of a black hole?
Просмотров 602 тыс.3 года назад
Black holes are perhaps the most enigmatic objects in the universe. Popularised in movies and science fiction, they evoke the magic and mystery of our universe and provide inspiration for those looking to make their mark in the world of academic physics. But what exactly is a black hole? And how can we study them? According to Einstein’ theory of general relativity, a black hole is a region of ...
Dark Energy and the Vacuum Catastrophe
Просмотров 424 тыс.3 года назад
In this video I would like to discuss one of the great unsolved problems in fundamental physics, the famous vacuum energy catastrophe (also known as the cosmological constant problem). What makes the problem so fascinating is that it weaves together two of the most successful theories of the 21st century, quantum field theory and general relativity, and demonstrates that something has gone cata...
What is the Cosmic Microwave Background Radiation? And what does it mean?
Просмотров 207 тыс.3 года назад
This video provides an overview of the accidental discovery and explanation of the cosmic microwave background radiation, the afterglow of the big bang, and follows the narrative of Steven Weinber'gs fantastic book: The First Three minutes. After reviewing the initial experimental work of Penzias and Wilson, a detailed account of the theoretical interpretation is presented, including a discussi...
Deriving Einstein's most famous equation: Why does energy = mass x speed of light squared?
Просмотров 1,6 млн3 года назад
E=mc^2 is perhaps the most famous equation in all physics, but very few people actually know what the equation means, or where it comes from. In this video I would like to show one method for deriving this equation, as well as provide some insight into what the equation actually means. Along the way we will also touch upon some of the most fascinating features of Einstein’s theory of special re...
What is a rainbow?
Просмотров 69 тыс.3 года назад
This video explores the physics of rainbows by considering how light is refracted as it passes through water droplets. The formation of both primary and secondary rainbows (double rainbows) is explained, as well as the formation of the dark band known as 'Alexander's band'. In his poem of 1820 entitled Lamia, John Keats complained that cold science had destroyed the magic of nature, conquering ...
The Planck scale: Is there a fundamental limit to space and time?
Просмотров 848 тыс.3 года назад
This video explores the fundamental lower limits of space and time by considering what would happen if two electrons are squeezed closer and closer together. After discussing the ratio of electric and gravitational forces, Heisenberg's uncertainty principle is combined with Einstein's theory of special relativity to show that at very small distance scales the strength of gravity becomes compara...
What is the Ultraviolet Catastrophe?
Просмотров 2 млн3 года назад
This video provides a detailed explanation of the ultraviolet catastrophe and Max Planck's solution to the problem following the presentation of Esiberg and Resnick in their textbook 'Quantum physics of atoms, molecules, solids, nuclei and particles'. The work of Rayleigh and Jeans is discussed in detail, as well as the quantum hypothesis proposed by Planck. References for this video: Quantum p...
What is Wave Particle Duality?
Просмотров 434 тыс.3 года назад
This video looks at the history of ideas behind the concept of wave particle duality, with a particular focus on the work of Louis de Broglie and the matter-wave hypothesis. After discussing the groundbreaking experimental work of Thomas Young and the concept of wave interference, a brief discussion is given to Einstein's explanation of the photoelectric effect. This provides a launch point for...
What is the Bohr model of the atom?
Просмотров 400 тыс.4 года назад
This video looks at the pioneering work of Niels Bohr who proposed a novel model of the atom in 1913 which would lay the foundations for a quantum mechanical treatment ten years later. After discussing the limitations of Thomson's Plum Pudding model and Rutherford's Nuclear model, Bohr's quantum model is discussed as a union between classical ideas of electrostatics and angular momentum quantis...
What is Compton Scattering?
Просмотров 242 тыс.4 года назад
This video provides a detailed overview of Compton Scattering and its role in the development of quantum physics. The photon model of light is used to explain the Compton shift in wavelength of scattered x-rays by electrons. The principles of energy and momentum conservation are used to calculate the size of the wavelength shift as a function of scattering angle. The video ends with a discussio...
The Principle of Least Action: Derivation of Newton's Second Law
Просмотров 116 тыс.5 лет назад
The Principle of Least Action: Derivation of Newton's Second Law
Estimating the number of atoms in the observable universe
Просмотров 68 тыс.5 лет назад
Estimating the number of atoms in the observable universe
Greek Physics: Calculating the distance to the Sun and Moon
Просмотров 219 тыс.5 лет назад
Greek Physics: Calculating the distance to the Sun and Moon

Комментарии

  • @Dyslexic-Artist-Theory-on-Time
    @Dyslexic-Artist-Theory-on-Time 8 часов назад

    Could light be a spherical 4πr² EM wave over a ‘period of time’ and have particle characteristics relative to the atoms of the Periodic Table when we have the absorption and emission of light? Is the exchange of light photon ∆E=hf energy continuously transforming potential energy into the kinetic Eₖ=½mv² energy of matter, in the form of electrons, as an uncertain ∆×∆pᵪ≥h/4π probabilistic future unfolds? Is the Future relative to our actions with the Planck Constant h/2π being a constant of action within a geometrical spherical 4πr² process that forms the characteristics of 3D space and continuum of time ∆E ∆t ≥ h/2π?

  • @hendrixphiri5429
    @hendrixphiri5429 9 часов назад

    Love you bro. Absolutely sessional marvellous splendid astonishing

  • @lincolnuland5443
    @lincolnuland5443 14 часов назад

    Ain't no blackholes y'all...sry. They're not singular objects, the gravity at any point on the 'edge' (event horizon) could never be so strong that you can't just... leave. The 'gravity' is not a singular field, it's gazillions of little itty bitty fields... They add different...

  • @darrylmistelske7295
    @darrylmistelske7295 19 часов назад

    Disregard my last inquiry on energy levels. I just discovered that all elements have an infinite number of potential energy levels into which an electron with sufficient energy can elevate to higher levels. pardon.

  • @darrylmistelske7295
    @darrylmistelske7295 19 часов назад

    Similarly, for any element with just one energy level, how can this photon emission occur for any of those elements when there is just one energy level and thus no opportunity to cross energy levels.

  • @darrylmistelske7295
    @darrylmistelske7295 19 часов назад

    The illustration provided on Hydrogen ... which has just ONE energy level with one valence slot. So how is it possible for the hydrogen electron to move into any other energy level than ONE ? I am a learning novice, pardon. I dont understand this concept.

  • @manfredgebhardt6562
    @manfredgebhardt6562 19 часов назад

    Super

  • @manfredgebhardt6562
    @manfredgebhardt6562 19 часов назад

    2 und 3

  • @manfredgebhardt6562
    @manfredgebhardt6562 19 часов назад

    Gut

  • @manfredgebhardt6562
    @manfredgebhardt6562 19 часов назад

    Alles kann geregelt werden um den 0 Punkt zu verschieben. Zum Beispiel Vordere Betrachtung vorne Rechts und hinter Links. Und die Pluszeichen genau wie Oben nur in der Mitte Positiv und Negativ. Dann kann ein Bestimmtest punktförmiges in der Mitte Blei und Kupfer angebrach werden zur Schöpfung zu machen.

  • @manfredgebhardt6562
    @manfredgebhardt6562 19 часов назад

    Schwerkraftstrahler ist ein Bleistab und Plusstrom das an den Beiden Enden zusammenkommen. Kupferstab in Minusstrom an beiden Enden zusammen gemacht. Magnetismusstrahler . Bleistab in Minusstrom an an beiden Enden und Kupferstab mit Plusstrom an beiden Enden.

  • @manfredgebhardt6562
    @manfredgebhardt6562 20 часов назад

    Mit Regler

  • @manfredgebhardt6562
    @manfredgebhardt6562 20 часов назад

    3

  • @manfredgebhardt6562
    @manfredgebhardt6562 20 часов назад

    Gut

  • @manfredgebhardt6562
    @manfredgebhardt6562 20 часов назад

    2 Kuntstoffschüssel unten Rechts und oben Links Plusstrom Kupfer, Unten Links und Oben Rechts Minusstrom Blei.

  • @joenahhas4377
    @joenahhas4377 День назад

    E = mc² the dumbest equation in all of physics considering c = distance = Sun's radius: There are 5000 proofs, or all the laws of physics has the Sun’s radius = 299792458 meters You are indoctrinated and domesticated in the whorehouse named modern university. (1) {[ (2 x π x c) m/86400 s] / Sine (c/r); r =Earth radius = 6378137 m)} / (air index =1.000293833) ³ = 29782.03755 m/sec = Earth's orbital speed (2) Sun's visual radius = [(Sun’s actual radius c) /tangent Ecliptic angle] x [1 + (1day/1year)] ² (3) c/r = 2E; E = ecliptic angle (4) Sine (c/r)/ (c/r) = Earth’s rotation speed/Earth’s speed around the Sun.

  • @tomray8765
    @tomray8765 День назад

    Isn't a mass "at rest", effectively STILL moving through TIME?

  • @joenahhas4377
    @joenahhas4377 День назад

    The Phoenicians defined the relation between Sun’s radius c and Earth’s radius r: (c/r) = 2E; E = ecliptic plane angle And confirmed it by the formula **Sun's visual radius = [(actual radius c) /tangent Ecliptic angle] x [1 + (1day/1year)] ²** And added (c/r)/ [sine (c/r)] = Earth’s rotation speed/Earth’s visual revolution speed. The Phoenicians produced the entire solar system as visual effects of Earth’s rotation that alter the circular motion of Earth to a sinusoidal visual and sinusoidal + circular = solar system illusions or classical physics and astronomy, and (sinusoidal - circular) = space-time delusions

  • @robertengland8769
    @robertengland8769 День назад

    Schrodinger was a dumbass! Einstein was the real deal! People dont even know me, so stop judging before you have all the facts.

  • @omerbar7518
    @omerbar7518 День назад

    Amazing!!! I love your videos, can't wait for the next one

  • @stewiesaidthat
    @stewiesaidthat День назад

    Here is the simplified version. Energy can be neither created nor destroyed, only transformed. Acceleration is what transforms it from a solid, to a liquid to a gas. From atomic energy to radiant energy. E=mc where c is the speed of light. Speed is distance/time so Energy equals time. C-squared thus becomes accelerating the radioactive decay rate. Shortening the amount of time it takes to go from atomic energy to radiant energy. E=mc is the basis for all lifespans (absolute acceleration). The photon's wavelength tells it how long (distance) it can travel before it propagates a new photon. E=mc describes the lifespan of the various plants and animals. With (m) mass and (c) metabolic rate determining the organisms lifespan.

  • @steb430
    @steb430 2 дня назад

    I totally loved this.

  • @manfredgebhardt6562
    @manfredgebhardt6562 2 дня назад

    In 3

  • @manfredgebhardt6562
    @manfredgebhardt6562 2 дня назад

    Das Errste

  • @manfredgebhardt6562
    @manfredgebhardt6562 2 дня назад

    Gut

  • @manfredgebhardt6562
    @manfredgebhardt6562 2 дня назад

    Man muß das Wetter aussuchen egal welcher Himmel. Rot ist Schnee, Braun ist Nebel, Orange ist Hagel, Ockergelb ist Kraupel, Gelb ist Regen, Grün ist Gewitter, Blau ist Sturm, Violett ist Sonnenschein.

  • @Cartman9999
    @Cartman9999 2 дня назад

    기록용

  • @user-sc2cz4hp3z
    @user-sc2cz4hp3z 3 дня назад

    I STILL DONT KNOW WHY YOU TOOK OUT EXTREMELY GOOD VIDEOS OUT THE CHANNEL

  • @trsomas
    @trsomas 3 дня назад

    This is an interesting problem related to mass energy equivalence. ruclips.net/video/vx2trjqT_K8/видео.html

  • @gato-junino
    @gato-junino 3 дня назад

    Man, I'm an Industrial Engineer. I teach Logistics. I have studided parcial derivatives, Calculus etc. When I see these equations I feel comfortable even after some many years after my undergraduation. I have never stared to any industrial problem which used these equations. When you know what it means and how to solve these equations,

  • @gato-junino
    @gato-junino 3 дня назад

    My comments is related to Huygen's and Newton's opinion about light. Newton had a huge influence on Science and he blocked light to be studied deeper for many years.

  • @Mitsoxfan
    @Mitsoxfan 4 дня назад

    33 minutes to get to the E^2 equation. Now that's some maths!

  • @kevinboles3885
    @kevinboles3885 4 дня назад

    I am only 17 minutes in, but I am wondering why the charge-repulsion of the equal number of protons in the white dwarf has been completely ignored in all considerations of what forces could support the star against gravitational collapse. It is my understanding that the like-charge repulsive force increases dramatically as the distance between the particles is reduced. Is this force in a very compact star completely negligible compared to EDP?

  • @ImSoUnbelievablyCooked
    @ImSoUnbelievablyCooked 4 дня назад

    Wow, this is really what i needed to truly grasp relativity, at least in terms of the path of motion

  • @Beltandjacketowner
    @Beltandjacketowner 5 дней назад

    I am really hopping for more videos. These are fantastic! ❤

  • @robertmfacto
    @robertmfacto 5 дней назад

    Is dark energy centrifugal force?

  • @somphopsirikham7720
    @somphopsirikham7720 6 дней назад

    Great video

  • @gato-junino
    @gato-junino 6 дней назад

    We can create such incredible things, but when it came to Politics, Emotions and Relationships, Humankind is a nightmare.

  • @pallenking
    @pallenking 7 дней назад

    Great video. Seems like you are a short hop from describing an electron in 3-space, showing how wide it is. Maybe you already have

  • @bobbyking2490
    @bobbyking2490 8 дней назад

    Wonderful video!

  • @theeyasakthi1109
    @theeyasakthi1109 8 дней назад

    You are a life saver bruhhhhh 😭😭

  • @elicthanks7578
    @elicthanks7578 8 дней назад

    If you didn't understand a thing about it it doesn't mean you're less smart or anything, this was taught using math language, if there was a way to adapt those concepts to your every day language you'd might even comprehend this matter better than those who can understand what's being said Language is like a bridge to deliver information to your mind, if there's no bridge there's no information delivered, so there's no comprehention, and so you have the ilusion of not being smart. The contrary is also true those who can understand the language might have the ilusion of being smarter when speaking in a language that only a few understand, but since we're humans all of us have the inate tendendy to comprehend all of those concepts. our minds do all of these calculations spontaneously, one example of this inate tendency is how your vison work, when you look forward you can tell whether something is close to you or far away, this is thanks to the math inside your brain making a lot of calculus, these calculus are so deep that our consceouss doesn't have time to think about them, so they are deep in our uncosceous, so most of the physics is not about trying to understand how things work but trying to describe and become aware of how our brains are interpreting them

  • @thoughticality6044
    @thoughticality6044 8 дней назад

    Wow, dimensional analysis is super powerful holy cow

  • @devonterushdan3258
    @devonterushdan3258 9 дней назад

    I've seen a lot of videos about the Heisenberg Uncertainty Principle, and they all talk about "adding" waves to create a superposition, but what does that even mean in reality? Why does -seemingly- arbitrarily adding multiple sin and cos functions represent ONE SINGLE ELECTRON moving through space? I understand that Quantum Particles behave like particles and waves, but why does that allow us to add randomly generated sine and cosine functions and use them to represent electrons?

  • @stewiesaidthat
    @stewiesaidthat 9 дней назад

    Mass is not an actionable force. Any equation with G (gravitational attraction) in it is flat earth science. Gravity/mass attraction comes from the theory that the earth is a stationary plane that requires mass attraction to keep objects from floating off into space. Hawkings : flat earther. Einstein: flat earther. Newton: flat earther. You have to go all the way to Galileo to find a non flat earther. Mass does not attract mass. The earths motion in space is what creates the tides. E=mc. Mass comes from Acceleration. How can mass create acceleration. These low IQ flat earthers dont even understand basic physics. Worst yet, they are brainwashing everyone to believe in their fake religion.

  • @gntmon3547
    @gntmon3547 9 дней назад

    too bad heres no latex...but. The Einstein field equation Rμν−12Rgμν=8πGc4TμνR_{\mu u} - \frac{1}{2}R g_{\mu u} = \frac{8 \pi G}{c^4} T_{\mu u}Rμν−21Rgμν=c48πGTμν is derived from the following steps: 1. Einstein-Hilbert Action: The action SSS for general relativity is given by: S=116π∫−g d4x (R+2Λ)S = \frac{1}{16 \pi} \int \sqrt{-g} \, d^4x \, (R + 2\Lambda)S=16π1∫−gd4x(R+2Λ) where RRR is the Ricci scalar, Λ\LambdaΛ is the cosmological constant, ggg is the determinant of the metric tensor gμνg_{\mu u}gμν, and d4xd^4xd4x represents the four-dimensional volume element. 2. Variation of the Action: The Einstein field equations are derived by varying the action SSS with respect to the metric tensor gμνg_{\mu u}gμν: δS=116π∫−g d4x (−ΔR+Rμνδgμν+2Λδg)\delta S = \frac{1}{16 \pi} \int \sqrt{-g} \, d^4x \, \left( -\Delta R + R_{\mu u} \delta g^{\mu u} + 2\Lambda \delta g ight)δS=16π1∫−gd4x(−ΔR+Rμνδgμν+2Λδg) where ΔR\Delta RΔR is the variation of the Ricci scalar RRR and δgμν\delta g^{\mu u}δgμν represents the variation of the metric tensor gμνg^{\mu u}gμν. 3. Stress-Energy Tensor: The stress-energy tensor TμνT_{\mu u}Tμν is defined in terms of the Lagrangian density LLL: Tμν=2−g∂(−gL)∂gμνT_{\mu u} = \frac{2}{\sqrt{-g}} \frac{\partial (\sqrt{-g} \mathcal{L})}{\partial g^{\mu u}}Tμν=−g2∂gμν∂(−gL) where L=R+2Λ\mathcal{L} = R + 2\LambdaL=R+2Λ is the Lagrangian density. 4. Derivation of Einstein Field Equations: By equating the variation of the action to zero (principle of stationary action), we obtain: −12ΔR+Rμν−12Rgμν+Λgμν=8πGc4Tμν-\frac{1}{2} \Delta R + R_{\mu u} - \frac{1}{2} R g_{\mu u} + \Lambda g_{\mu u} = \frac{8 \pi G}{c^4} T_{\mu u}−21ΔR+Rμν−21Rgμν+Λgμν=c48πGTμν 5. Simplification: Rearranging terms and using the definition ΔR=Rμν−12Rgμν\Delta R = R_{\mu u} - \frac{1}{2} R g_{\mu u}ΔR=Rμν−21Rgμν, we arrive at the Einstein field equation: Rμν−12Rgμν+Λgμν=8πGc4TμνR_{\mu u} - \frac{1}{2} R g_{\mu u} + \Lambda g_{\mu u} = \frac{8 \pi G}{c^4} T_{\mu u}Rμν−21Rgμν+Λgμν=c48πGTμν Therefore, the equation Rμν−12Rgμν=8πGc4TμνR_{\mu u} - \frac{1}{2} R g_{\mu u} = \frac{8 \pi G}{c^4} T_{\mu u}Rμν−21Rgμν=c48πGTμν is indeed derived rigorously from the Einstein-Hilbert action, where RμνR_{\mu u}Rμν, RRR, gμνg_{\mu u}gμν, Λ\LambdaΛ, GGG, and ccc have specific meanings related to curvature, the cosmological constant, gravitational constant, and the speed of light respectively. It accurately describes how spacetime curvature is related to the distribution of energy and momentum, encompassing the fundamental principles of general relativity. Regarding the statement about Poisson's equation: κ=8πGc4\kappa = \frac{8 \pi G}{c^4}κ=c48πG This relation ensures that in the weak-field limit, the Einstein field equations reduce to Poisson's equation, which describes Newtonian gravity. simple. hz is frequency of light(fastest), speed of light is wawelenght of photon.

  • @primenumberbuster404
    @primenumberbuster404 10 дней назад

    :( please come back.

  • @notredan7831
    @notredan7831 10 дней назад

    Brilliant explanation!

  • @tatigsarti
    @tatigsarti 12 дней назад

    Can we all agree that the editing is top-notch?

    • @CliffSedge-nu5fv
      @CliffSedge-nu5fv 5 дней назад

      It is rather good. Very clear and easy to follow, engaging. If only my hand would stop cramping up as I write down all the equations!

  • @coodudeman
    @coodudeman 13 дней назад

    deh-boys.. lolol