Special Relativity Special Relativity These pages are ok as far as they go, but they are missing the planned highlight, to show you what things actually look like when you travel at near the speed of light. I hope to have the opportunity to develop these pages further as time permits. Beginning and End of the Universe July 26, 2010 § Universe History * The diagram below outlines the major Eras of the Universe according to the Big Bang Theory. Click the picture for many more details and a larger image. The one line in the article that caught my attention the most was at the end. HPS 0410 Einstein for Everyone Title page, Preface and Table of Contents for Einstein for Everyone Introduction: the Questions Special Relativity Special Relativity: the Principles On Pauli and the Interconnectedness of all things There's been some argument on twitter and elsewhere as to whether Brian Cox made a mistake in his excellent "Night with the Stars" earlier this year. Apart from some below-the-line nonsense in blog comments, it's an interesting physics discussion and it made me refine my own thoughts about quantum mechanics a bit. So I feel like writing about it.
Pictures taken by the Hubble Space Telescope The Hubble Space Telescope was deployed from the Space shuttle Discovery during STS-31 on April 25, 1990. Since then, there have been 5 servicing missions that continued to upgrade the telescope's scientific instruments and operational systems. Hubble reached a major milestone, its 20th anniversary in orbit, on April 24, 2010. Hubble imagery has both delighted and amazed people around the world and has rewritten astronomy textbooks with its discoveries. In this dated April 24, 1990 filed photo shows the Shuttle Discovery lifts off launch pad, carrying a crew of five and the Hubble Space Telescope STS-125 crew member aboard the Space Shuttle Atlantis showing this image of the Hubble Space Telescope as the two spacecraft continued their relative separation on 19 May 2009
Usenet Physics FAQ Version Date: March 2013 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.
Big Bang Abandoned in New Model of the Universe July 29, 2010 § This is one of the most exciting theories I have heard in a long time. I am going to tell you why and you are going to think I am even nuttier than you already do. But, as you know, I don’t care. One night after watching some documentary about Stephen Hawking and the black hole wars, I was lying in bed just contemplating the Universe. Physics Flash Animations We have been increasingly using Flash animations for illustrating Physics content. This page provides access to those animations which may be of general interest. The animations will appear in a separate window.
Quantum Diaries We’ve been discussing the Higgs (its interactions, its role in particle mass, and its vacuum expectation value) as part of our ongoing series on understanding the Standard Model with Feynman diagrams. Now I’d like to take a post to discuss a very subtle feature of the Standard Model: its chiral structure and the meaning of “mass.” This post is a little bit different in character from the others, but it goes over some very subtle features of particle physics and I would really like to explain them carefully because they’re important for understanding the entire scaffolding of the Standard Model. My goal is to explain the sense in which the Standard Model is “chiral” and what that means. In order to do this, we’ll first learn about a related idea, helicity, which is related to a particle’s spin.
Index to Physics Demonstration Equipment Index to Physics Notebooks Back to Physics Demonstrations' Home Page Acceleration A+0+0 "Coin and Feather" fall in an evacuated rotatable tube. A+0+5 Timed free fall: Ball drops 2 meters through electronic timing gate. A+0+10 Atwood machine: Unbalanced weights on a pulley accelerate slowly.