Physics Homework Help, Physics Help, Physics Tutors Free Web Development Courses | The Odin Project This course is for anyone who is either starting from scratch or who isn't entirely comfortable with their understanding of the command line, HTML, CSS, Javascript, Ruby, web frameworks, Git, or other foundational technologies and practices of web development. We cover a LOT of ground -- by the end of this comprehensive course, you'll be well prepared to take on our deep dive courses or explore further on your own. You Will Learn 4192741 When you turn on a torch, does the light instantly reach the speed of light? Or does it accelerate up to that speed very quickly? The short answer is that light coming out of your torch instantly reaches the speed of light. Light can only ever travel at the speed of light — 300,000,000 metres per second in a vacuum, and a bit slower in air because it bumps into molecules. So why is light only allowed to travel at that one speed? "There are two ways to answer that question" says David Jamieson, professor of physics at the University of Melbourne. Thankfully he has a better way — with an analogy to waves in string. "Imagine you've got a tight string and you pluck it and a wave goes shooting down the string. But there's a big difference between light waves and these waves. The physicist James Clerk Maxwell worked out that all light is made of oscillating electric and magnetic fields, coupled together and reinforcing one another. Two constants make another constant
Special Relativity and Electrodynamics (Spring, 2012) 1 The Lorentz transformation In the first lecture of the course Professor Susskind introduces the original principle of relativity - also known as Galilean Invariance - and discusses inertial reference frames and simultaneity. He then derives the Lorentz transformation of... [more] 2 Adding velocities Professor Susskind starts with a brief review of the Lorentz transformation, and moves on to derive the relativistic velocity addition formula. He then discusses invariant intervals, proper-time and distance, and light cones. Note: this is only a 1...
Backreaction Home | Practical Physics This website is for teachers of physics in schools and colleges. It is a collection of experiments that demonstrate a wide range of physical concepts and processes. Some of the experiments can be used as starting-points for investigations or for enhancement activities. Physics is a practical science. Good quality, appropriate physics experiments and investigations are the key to enhanced learning, and clarification and consolidation of theory. We have published a new set of resources to support the teaching of practical science for Key Stages 3-5.
Teach Yourself Logic: A Study Guide, and other book notes Most philosophy departments, and many maths departments too, teach little or no serious logic, despite the centrality of the subject. Many students will therefore need to teach themselves, either solo or by organizing study groups. But what to read? Students need annotated reading lists for self-study, giving advice about the available texts. The main Guide and its Appendix are in PDF form, designed for on-screen reading. Teach Yourself Logic 2105: A Study Guide (PDF, iv + 94 pp.) If the Guide’s length makes it sound daunting, there are also some supplementary webpages which might help ease your way in: About the Guide Is the Guide for you? And here are some additional webpages: It goes without saying, of course, that all constructive comments and suggestions continue to be most warmly welcomed.
stars.chromeexperiments General Relativity (Fall, 2012) 1 The equivalence principle and tensor analysis The principle of equivalence of gravity and acceleration, or gravitational and inertial mass is the fundamental basis of general relativity. This was Einstein's key insight. Professor Susskind begins the first lecture of the course with Einstein'...
Not Even Wrong I’ve just replaced the old version of my draft “spacetime is right-handed” paper (discussed here) with a new, hopefully improved version. If it is improved, thanks are due to a couple people who sent helpful comments on the older version, sometimes making clear that I wasn’t getting across at all the main idea. To further clarify what I’m claiming, here I’ll try and write out an informal explanation of what I see as the relevant fundamental issues about four-dimensional geometry, which appear even for $\mathbf R^4$, before one starts thinking about manifolds. Spinors, twistors and complex spacetime In complex spacetime $\mathbf C^4$ the story of spinors and twistors is quite simple and straightforward. While spinors are the irreducible objects for understanding complex four-dimensional rotations, twistors are the irreducible objects for understanding complex four-dimensional conformal transformations. Real forms In this case the conjugation acts in a subtle manner. Some philosophy
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