You just discovered this channel? If you are interested in Physics, or even better, studying Physics at school ( IB Physics, A-Levels, AP etc.), this channel is for you! Written version: You just discovered this channel? If you are interested in Physics, or even better, studying Physics at school ( IB Physics, A-Levels, AP etc.), this channel is for you! Written version: "Hi, welcome to the channel where Physics is Made Easy! So what will you find here? Well everything a student studying Physics in his or her final years of High school will need! For example: _ Lessons in line with the IB and A-Levels programs, that are presented in a fun and inspiring way. _ Past Papers workshops where you can test yourself and check your work with a detailed analysis of the exercise. I have worked on many past papers, and I found out many patterns and tips, I will be sharing these with you during these workshops! _ High School programs are interesting, but sometimes I like producing more general videos about fascinating things like for example, how the big bang gave rise to the world around us, or more day to day stuff, like “how rainbows are formed”, things like these, you know. My name is Edouard, I have a Ph.D. in material science and I am a private tutor in Physics. I love teaching and seeing people that I help, grow and become successful! Ok, I thought why not share all that stuff this with the world? So here I am, producing these videos and putting them online for you! So if you are studying Physics or you are just interested by it, stick around, it’ll be fun so, subscribe to the channel! See you out there." Edouard Reny is a private tutor in Physics and a composer (All background music on this video has been composed by Edouard) Website Tuition: http://www.physics-tutor.nl/ Website Musical activities: http://www.synaptic-machines.com/ ... https://www.youtube.com/watch?v=MsSf50OfKD4

This video is aimed at IB students studying HL or SL Physics. It can also help students preparing other diplomas in getting grips with the subject. In this episode, we will be working on an exercise inspired by a past paper that deals with double slit interference patterns and diffraction gratings (Waves). An exercise will appear on the screen. Pause the video and work it out by yourself. Then, we will review the exercise together. Questions a to d are suitable for SL students. HL students, please work on all questions. This video is produced and presented by Edouard Reny, Ph.D. in materials sciences and private tutor in Physics. http://www.physics-tutor.nl/ Please subscribe to get notified when new support video are posted! ******* Exercise Text *********** A light of unknown wavelength illuminates two slits that are distant of 0.210 mm from each other. The widths of the slits are negligible. On a screen located at a distance of 3.20m from the pair of slits, bright fringes are observed. The maxima of the fringes are separated by 1.00 cm. a/ Explain how the fringes form. (2 Marks) b/ Determine the wavelength of the light that passes through the slits. (3 Marks) c/ The intensity of the light on the screen due to one slit is 15 W/m^2. Plot on a graph how the intensity of the light passing through the two slits varies on the screen with the distance from the middle of the central fringe. (3 Marks) d/ The two slits are now replaced with two slits of non-negligible width. Sketch another graph of the interference pattern that would be observed on the screen. (2 marks) e/ The two slits are removed and replaced by a diffraction grating. The second order maximum of the light appears for an angle of 62 degrees. How many slits does this grating have in one millimeter? (2 Marks) f/ Another beam of visible light illuminates the grating. It creates a maximum at the same angle as in e/. The order of that maximum is different. Determine the wavelength of this beam and the order of this maximum. (2 Marks) ... https://www.youtube.com/watch?v=ElQ_5chh6YE

The concept of electric fields is a cornerstone of all topics related to electricity. This is why it is essential to understand what are electric fields, and feel comfortable when manipulating them. This is what this course section is all about: Together, we will dive deep into the foundations of electric fields. You can consult this section on Electric Fields by enrolling to the Course "Electricity, The Basics" on Udemy. "Electric Fields" is the 3rd Section. Access to course: https://www.udemy.com/course/electricity-the-basics/?referralCode=640E55D087C7FDBE5110 Prior to the study of electric Fields, it is advisable to know what is are electric charges and electric forces. You can do so either by taking the full course on Udemy, or by visualizing the sections related to electric forces and electric charges on Skillshare: Electric Charges: https://skl.sh/2vdI4eA Electric Forces: https://skl.sh/3bJZArw If you are not a subscriber to Skillshare, you can consult their whole catalog of courses (included this one) for free for 2 Months by using any of these link! *** What you will learn *** In the words “electric fields”, there is the word “field”. So, the first video focuses on defining what a field is, and from there, it branches to the definition of an electric field. The 2 videos that follow describe in detail the cause and the effect of an electric field, by introducing the notion of electric field strength. These videos are followed by 3 exercise videos where you can train your new knowledge. The last of these exercises shows you how Coulomb’s Law emerges naturally from the notion of electric fields. The 4 lessons and exercise videos after that show you how to manipulate electric fields strengths as vectors. This will teach you to predict how a charge placed in one or more electric fields moves. This naturally leads us to the concept of electric field lines in the next two videos, with a special focus on the two most common electric field geometries: radial fields and uniform fields. The final video is an exam level exercise that centralizes all the notions presented in this course. Follow this course diligently. Work on the exercises. And you will gain a solid understanding of electric fields. Then, you will be able to rely on this new understanding for the study of all the other subjects related to electricity. *** Who is this course for? *** The level of this course corresponds to the last years of high-school physics programs. This makes it an ideal tool as support for the lessons you get at school, and to prepare any high-school diplomas in physics, like for example IB Physics, A-Level Physics, AP Physics etc. In addition, any person that wishes to brush up on the very basics of electricity should find this course useful. ... https://www.youtube.com/watch?v=sRZ8DYtP2zM

If you have studied or are studying physics, or even if you are just a physics fan, you must have already met magnetic fields, and more than once! These show up a little everywhere: of course in electrical sciences, but also in planetology, astrophysics, medical physics, analytical chemistry, and many other subjects. At school and in Uni, you have been taught how to manipulate them mathematically, and how they are an intricately involved in today's technology (motors, generators, transformers etc…). But do you actually know what they truly are physically? For example, could you explain it to a young student that encounters magnetic fields for the first time in physics class ? That is the exercise I attempted with this video First, we review what you learned in high school, starting with a simplified version of Ampere’s law: an electrical current generates a magnetic field that curls around it. We also discuss how a magnetic field affects the path of a moving charge. In a second section, we take a brief turn in order to observe one of the consequences of Einstein theory of special relativity: Length contraction. The third section puts everything together and draws a coherent picture of the nature of a magnetic field. And in a conclusion, we realise that a magnetic field emerges from the combination of electrical theories and special relativity. And of course all is spiced up with reflections on how historically, magnetic fields took such a predominant place in modern science. I hope you enjoy this video, I sure had fun producing it! - - - - - - - - Structure of the video: 00:00 Introduction 00 :34 30K subs! 00:55 Content of the Video 01:32 Magnetic Effects – description of a charge moving parallel to a current carrying cable. 02:38 Magnetic Effects – magnetic field generated by an electrical current 03:09 Magnetic Effects – Magnetic force on a moving charge 04:14 The birth of electromagnetism, a historical reflections about magnetic fields 05:27 Length contraction 07:05 The nature of magnetic fields 09:55 What is a magnetic field ? 10:17 Magnetism is an emergent phenomena (a discussion) 11:41 End of video salutation to the Physics Made Easy community - - - - - - - - - Prior knowledge required: In order to fully grasp the content of this video, the viewer needs to be familiar with the following concepts already presented in a PME video. _ What is a charge : https://youtu.be/8VN8MDn4CFA _ What is a field : https://youtu.be/_n_jRP8u1gI _What is an electric field : https://youtu.be/hrHCj09_dpc - - - - - - - - - Addendum: regarding conservation of charge… You might wonder : because relativity changes the charge density experienced by a moving charge, could this violate the principle of conservation of charge ? No, it doesn’t. The reason is that for a current to flow in a circuit, the circuit needs to be closed, i.e. in a loop: relatively to the motion of the moving charge, the current needs to flow in the opposite direction in another section of the circuit : Imagine a moving charge q magnetically affected by a current going from left to right in section A of the circuit. The charge will also see a current flowing from right to left in another section of the circuit (let’s call it section B). For charge q, section B will have charged densities reversed compared to section A. On the other hand, it might not be magnetically affected that much, because that effect depends on spacial distance (inversely proportional). Overall, charge is conserved wether the observer is moving or not. - - - - - - - - - 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. The galactic background at the end of the video : Traverse galaxy by F. Summers, G. Bacon (STScI). This background is more than an artistic view, it is a simulation : C Hummels, P. Hopkins (CalTech) and A. Wetzel (UC Davis) - - - - - - - - - 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=NOQK57fgu80