Gerard ’t Hooft, Theoretical Physics as a Challenge by Gerard 't Hooft Note: This web site will soon be removed from its present address. An updated and renewed version is available at: This is a web site for young students - and anyone else - who are (like me) thrilled by the challenges posed by real science, and who are - like me - determined to use their brains to discover new things about the physical world that we are living in. In short, it is for all those who decided to study theoretical physics, in their own time. It so often happens that I receive mail - well-intended but totally useless - by amateur physicists who believe to have solved the world. It should be possible, these days, to collect all knowledge you need from the internet. I can tell you of my own experiences. Theoretical Physics is like a sky scraper. Note that this site NOT meant to be very pedagogical. Languages:English is a prerequisite. Return to List Now, first things first : Algebraic equations.
10 Strange Things About The Universe Space The universe can be a very strange place. While groundbreaking ideas such as quantum theory, relativity and even the Earth going around the Sun might be commonly accepted now, science still continues to show that the universe contains things you might find it difficult to believe, and even more difficult to get your head around. Theoretically, the lowest temperature that can be achieved is absolute zero, exactly ? One of the properties of a negative-energy vacuum is that light actually travels faster in it than it does in a normal vacuum, something that may one day allow people to travel faster than the speed of light in a kind of negative-energy vacuum bubble. One prediction of Einstein’s theory of general relativity is that when a large object moves, it drags the space-time around it, causing nearby objects to be pulled along as well. Relativity of Simultaneity Since this extra dimension is so small, only tiny objects, such as particles, can move along it. Antimatter Retrocausality
- StumbleUpon Lectures - CPSS - ANU Duncan Haldane Slides (PDF 3.2MB) Recording 1, Recording 2, Public Lecture Recording Bio Joachim Brand Slides 1 (PDF 5.2MB), Slides 2 (PDF 5.7MB), Slides 3 (PDF 10.8MB) Recording 1, Recording 2, Recording 3 Bio Maja Cassidy Recording 1, Recording 2, Recording 3 Bio Michael Fuhrer Slides 1 (PPTX 1.5MB), Slides 2 (PPTX 12.3MB), Slides 3 (PPTX 6.3MB) Recording 1, Recording 2, Recording 3 Bio Victor Galitski Bio Dimi Culcer Slides 1 (PPTX 3.4MB), Slides 2 (PPTX 2.8MB), Slides 3 (PPTX 5.2MB) Recording 1, Recording 2, Recording 3 Bio Victor Gurarie Slides (PDF 166KB) Recording 1, Recording 2, Recording 3 Bio Stephen Hyde Slides 1 (PDF 18.8MB), Slides 2 (PDF 13.4MB) Recording 1, Recording 2 Bio Alexander Khanikaev Recording 1, Recording 2, Recording 3 Bio Vanessa Robins Slides 1 (PDF 6.7MB), Slides 2 (PDF 9.3MB), Slides 3 (PDF 8.2MB) Recording 1, Recording 2, Recording 3 Bio Immanuel Bloch Slides (PDF 100MB) Recording, Recording 2, Recording 3 Bio Scott Morrison Qiaoliang Bao Michael Freedman Recording Bio Recording
Usenet Physics FAQ Version Date: February 2018 This list of answers to frequently asked questions in physics was created by Scott Chase in 1992. Its purpose was to provide good answers to questions that had been discussed often in the sci.physics and related Internet news groups. The articles in this FAQ are based on those discussions and on information from good reference sources. They were later maintained and enlarged by Michael Weiss and Philip Gibbs. Most of the entries that you'll find here were written in the days when the Internet was brand new. So because of their age, the FAQ entries that you'll find here have a great deal of academic credibility—but they are not always perfect and complete. This document is copyright. General Physics Particle and Nuclear Physics Quantum Physics Relativity and Cosmology Speed of Light Special Relativity General Relativity and Cosmology Black Holes Reference Topics There are many other places where you may find answers to your question. Australia: England: Netherlands:
Bangkok Globe | 26 Pictures Will Make You Re-Evaluate Your Entire Existence The universe, man… THE UNIVERSE. 1. This is the Earth! 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. To paraphrase Carl Sagan, everyone and everything you have ever known exists on that little speck. 14. John Brady / Via The sun doesn’t even fit in the image. 15. 16. 17. Our sun probably gets its lunch money stolen. 18. 19. 20. 21. (That’s not a picture of the Milky Way, but you get the idea.) 22. Just THINK about all that could be inside there. 23. 24. Some of the other galaxies are thought to have formed only a few hundred million years AFTER the Big Bang. 25. 26. So if you’re ever feeling upset about your favorite show being canceled or the fact that they play Christmas music way too early — just remember… This is your home. This is what happens when you zoom out from your home to your solar system. And this is what happens when you zoom out farther… And farther… Keep going… Just a little bit farther… Almost there… And here it is. Oh man. source :buzzfeed.com
Math, Physics, and Engineering Applets Oscillations and Waves Acoustics Signal Processing Electricity and Magnetism: Statics Electrodynamics Quantum Mechanics Linear Algebra Vector Calculus Thermodynamics Mechanics Miscellaneous Licensing info. Links to other educational sites with math/physics-related information or java applets useful for teaching: And when you get tired of learning, here is some fun stuff: Pong Simulation Circuit-level simulation of original 1972 Pong. Essential Mathematica for Students of Science Tutorial Approach to Mastery of Mathematica Mathematica is a fully integrated system for technical computing. Among the capabilities it offers are: an interactive front end with notebook interface numerical calculations with (practically) unlimited precision symbolic manipulation special functions graphics typesetting extensibility Within a Mathematica notebook you can develop solutions to complex problems that combine symbolic derivations, numerical calculations, and graphical displays in an interactive document. The materials provided here are based upon a course, PHYS426, that I have taught at the University of Maryland several times during the last few years. The materials for this course consist of two types of notebooks. The notebooks may be accessed using the hyperlinks below. Create a top directory for the course, such as c:\My Notebooks\tutorial course. Primary language concepts and techniques Store these files in subdirectory Primary topics. Applications Algebra Data analysis
Physics Simulations and Artwork Here is a 3D view of a hydrogren atom in the 4f state. The left image was made in C++ using a technique described by Krzysztof Marczak to make it volumetric like a cloud of smoke. The right image was made in Mathematica by adding 2D cross-sectional layers. POV-Ray has a built-in internal function for the 3d orbital: // runtime: 4 seconds camera{location 16*z look_at 0} #declare P=function{internal(53)}; #declare P0=P(0,3,0,0); box{-8,8 pigment{rgbt t} hollow interior{media{emission 0.5 density{function{(P(x,y,z,0)-1.2)/(P0-1.2)} color_map{[0 rgb 0][1 rgb 1]}}}}} Links Atomic Orbital - time-dependant hydrogen atom simulation, by ?