Fermions are the building blocks of matter: they form your body, that of your friends, family and even your pet. Your car, your house, your school and actually the whole planet is made of fermions. They are definitely worth a look don't you think? In this video we will explore their mass and realise that most of it originates from the bonds between the quarks. We will also udnerstand why all matter is only formed of the lightest particles (up quark, down quark and electron) Suited for IB Physics and A-Level students. Episode 3A (Elementary fermions): https://youtu.be/9kez4tv9dmU Episode 2 (Composite particles) : https://youtu.be/e-oyDDnI348 Episode 1 (Elementary particles): https://youtu.be/guYfayO3ESI You can get free access to tons of other free resources that will help you with your studies of high school physics by visiting the website: https://www.physics-made-easy.com/ Link to the practical diagram summarizing all elementary particles as well as the composite particles to be known for the IB Physics exam: https://s3.amazonaws.com/kajabi-storefronts-production/sites/114163/downloads/wRWSYyUBTcSRGtIn9ylH_Standard_Model_of_Particle_Physics.pdf This video is produced and presented by Edouard Reny, Ph.D. in materials sciences and private tutor in Physics. He provides one-on-one private tuition in Physics (face to face or by Skype). If you wish to contact him, visit his website: https://www.physics-tutor.nl/ Introduction and conclusion music composed and produced by Edouard Andre Reny. Website: http://www.synaptic-machines.com ... https://www.youtube.com/watch?v=9bgN5o62ixs

Time Dilation, an introduction to Special Relativity. The flow of time depends on the motion of whoever measures it. This sounds quite counterintuitive, even weird, but, it is reality: time and space are intimately linked. With the progress of science that occurred by the end of the 19nth century, the first hints of this relationship were showing up. And it’s Einstein that put it all together in 1905 with his theory of special relativity. This video discusses time dilation, a specific effect of special relativity. The pedagogical approach here is different than from other videos you might find on Youtube, or even text books. I keep it simple, and limit myself to basic mathematics only. I believe that trying to teach Special Relativity from scratch and comprehensively in a 20-minute video is nonsense. That is why I preferred to focus on time dilation as an introduction to the subject. See this video as a super teaser, and a motivator to learn more. In the conclusion of the video, I give you a direction to follow if you wish to dig further (Lorentzian transformations). What will you learn in this video: _ What is an inertial frame of reference (and detecting those frames which are not inertial), _ The 2 postulates at the heart of special relativity and what these imply (basically, that’s what started the whole story), _ What is time dilation and how to visualize it, _ A derivation of the time dilation formula (where the most advanced maths that is used is the Pythagorean Theorem!), _ The notion of proper time interval, that allows you to spot immediately which frame of reference has the shortest time interval between two events (very useful to solve problems), _ Application example + exercise to check that you’ve got it, and that you can solve high school and early university time dilation questions. Enjoy and have fun discovering this model of the Universe! Edouard - - - - - - - - - Structure of the video: 00:00 Introduction 01:30 Content of the video 02:13 What is an inertial frame of reference? 05:10 The first postulate of special relativity 06:49 The second postulate of special relativity 08:56 Time dilation and the photon clock 10:50 Deriving the time dilation formula and the relativistic factor 13:11 The proper time interval 15:21 How to solve time dilation questions? (Special Relativity) 17:57 What we have learned of Special Relativity in this video 18:14 How to dig deeper into Special Relativity (explore Lorentzian transformations) 18:38 Conclusion - - - - - - - - - Prior knowledge required In order to fully grasp the content of this video, not much is needed. The viewer needs to be familiar with: _ Basic algebra _ the fact that speed = distance / time interval - - - - - - - - - Credits : The script, the illustrations, the music and the video were produced and presented by Edouard Reny, Ph.D. in solid state chemistry and private tutor in Physical Sciences. - - - - - - - - - Need help with your high school physics ?: Edouard provides one-on-one private tuition in Physics (face to face or by Skype). If you wish to know more about this, or contact Edouard, visit his website: https://www.physics-tutor.nl/ or this one (for French speakers) : https://profdephysique.fr/. ... https://www.youtube.com/watch?v=ilaBOHorFis

Particles are the Lego bricks of nature. Their interaction with each other constructs all matter that is present in our universe. Particle Physics studies how particles interact with each other. But before we explore how particles interact, we need to examine the particles which compose the standard model of particle physics. This is the objective of this first section: a reminder of the standard model of particle physics. This video (Part 1/3) presents the elementary particles (fermions, like quarks and leptons, and bosons, like the photon or the gluon). It shows how combining quarks lead to composite particles (hadrons like the proton, the neutron, the pion and the kaon). Antimatter is also discussed. This first video is a brief overview, so if you wish to view a lesson on the standard model of particles with more details and at a slower pace head on to these two videos: Elementary particles: https://youtu.be/guYfayO3ESI Composite particles: https://youtu.be/e-oyDDnI348 - - - - - - - - - - - - - - - - - - - Access to the table of particles: https://www.physics-made-easy.com/Standard-Model-of-Particle-Physics - - - - - - - - - - - - - - - - - - - The full lecture is structured around three videos that follow a general introduction. INTRODUCTION: https://youtu.be/gy-durcAhJ4 SECTION 2: Quantum numbers of particles https://youtu.be/3SVMrLmGHWQ SECTION 3: Conservation laws and particle physics reactions: https://youtu.be/E4JGzQjBgHg -- - - - - - - - - - - - - - - - - - - PART 2 is a detailed look at some of the properties of these particles, which are expressed as quantum numbers (Baryon number, Electric Charge, Lepton number, Strangeness). PART 3: In nature there are some symmetries that need to be respected in all interactions. These lead to the existence of conservation laws (via Noether's theorem). Quantum numbers need to follow these conservation laws. This idea is central. After viewing this section, you will be able to determine if a particle physics reaction is possible or not. For that, we will work on many examples of reactions including Beta decay, muon decay into a positron, and more. This lecture has a lot of information, it’s a real course in itself. I hope you enjoy it and that it helps in giving you a clearer idea about the reactions between particles. If you are a high school teacher, feel free to use anything you see fit in this video for your own students . - - - - - - - - - - - - - - - - - - - This video is produced and presented by Edouard Reny, Ph.D. in solid state chemistry and private tutor in Physics. For access to great resources that will help you with your studies of high school Physics, visit and subscribe to the "Physics Made Easy" website: https://www.physics-made-easy.com/ Edouard provides one-o ... https://www.youtube.com/watch?v=AJSL39hVVPw

Feynman diagrams are a graphical representation of the processes involved in particle physics reactions. This video is the first episode of a series of three that presents what are Feynman diagrams, how to understand and use them, and how to build them. In this episode you will learn what a Feynman diagrams is. We will use for this a well-known particle physics reaction as support, beta decay. Feynman diagrams are an insightful tool that puts to light the wonders of particle physics. The reactions occurring in particle physics are a marvel of processes involving the forces of nature (weak force, strong force and electromagnetic force). Writing these like a chemical reaction does not provide information about the processes involved, just what you start up with, and what you end up with. One can use the Quantum Chromodynamics (QCD) and Quantum Electrodynamics (EOD) to model quite well what is going on, but the mathematics involved is not for everyone! Instead, graphical representation of these reaction, invented by Richard Feynman, allow all to visualize the processes involved easily: Feynman diagrams. He introduced these originally as a graphical aid for visualizing and calculating interactions between electrons and photons. Today, Feynman diagrams are commonly used to depict all types of particle interactions. These videos are intended to help high school students with their physics studies as well as high school physics teachers wondering how to approach the topic with their students. **** Access to the Videos **** Introduction: Content review of the Feynman Diagram mini-series https://youtu.be/O9ihGuK53Ww Episode 2: Space, Time and Vertices. (presentation of the building elements of a Feynman diagram: space-time diagrams, the symbolism that is used, and the concept of vertex): https://youtu.be/JScJjZ9zW7A Episode 3: Feynman Diagrams, Let’s build some! (Learning how to build Feynman diagrams by example, using particle physics reactions like muon decay, pion decay, Kaon decay etc. https://youtu.be/vgk2aJRlBcg SUPER USEFUL - The table of particles: https://www.physics-made-easy.com/Standard-Model-of-Particle-Physics If you are not familiar with Particle physics, I recommend you start by viewing the series of videos that deals in detail with particle physics reactions: _ Introduction: https://youtu.be/gy-durcAhJ4 _ Elementary and composite particles of the standard model: https://youtu.be/AJSL39hVVPw _ Quantum numbers of particles: https://youtu.be/3SVMrLmGHWQ _ Conservation laws and particle physics reactions: https://youtu.be/E4JGzQjBgHg Particle Physics Reactions PART 1 is a reminder of the standard model of particle physics. It presents the elementary particles (fermions like quarks and leptons, and bosons, like the photon or the gl ... https://www.youtube.com/watch?v=TLBXrMixcu8