Log In - World Science U. SAO/NASA ADS: ADS Home Page. SAO/NASA ADS: ADS Home Page. ArXiv.org e-Print archive. Alexander Pruss's Blog. ONDAS, ACÚSTICA Y ELECTROSTÁTICA. Spherical Harmonics: What happens to an evaporating black hole? For years now I have written about the quantum physics of black holes, and each and every time I have pushed a single idea: that if black holes behave as (almost perfect) black bodies, then they should be described by the same laws as black bodies are.
And that means that besides the obvious processes of absorption and reflection, there is the quantum process of spontaneous emission (discovered to occur in black holes by Hawking), and this other process, called stimulated emission (neglected by Hawking, but discovered by Einstein). The latter solves the problem of what happens to information that falls into the black hole, because stimulated emission makes sure that a copy of that information is always available outside of the black hole horizon (the stories are a bit different for classical vs. quantum information.
These stories are told in a series of posts on this blog: I barely ever thought about what happens to a black hole if nothing is falling in it. Splitting photons? . What You Need to Know About Classical Mechanics. Summary We’ll talk about the two frameworks that can be used in classical mechanics and why one of them is much better than the other,You’ll understand how we can derive Newton’s famous second law F=md²dt²q=m¨q.You’ll understand the historic roots of the most important idea of modern physics and why it is so important.
It’s hard to find good explanations for the core ideas of classical mechanics, because classical mechanics isn‘t as sexy as quantum mechanics and isn’t always correct. It works great with big, everyday objects like rolling balls. but fails to describe nature at the most fundamental scale. We can‘t expect that an approximately correct theory is beautiful and many aspects of classical mechanics are ugly. Okay, you may think, this isn‘t a big problem, because even if Mr. “… it is more important to have beauty in one’s equations than to have them fit experiment” there is no good reason why our physical theories should be simple and beautiful. Newton’s Framework F=md²dt²q=m¨q, Phys.org - News and Articles on Science and Technology. Solar System Tour from the sun to pluto.
Musings of Carl Sagan ... "Before we found our way" Project Tuva: Enhanced Video Player Home. The Scale of the Universe 2. Links to Other Websites. GREPhysics.NET: All-solutions list. Daily GRE. OSU Undergraduate Physics: GRE Resources and Prep Course. Click for print version Undergraduate Physics at The Ohio State University Preparing for the Physics Subject GRE Test The Society of Physics Students in conjunction with the Office of Undergraduate Studies, have put together a FREE GRE preparation course for OSU Undergraduates.
The idea is to provide materials and course structure that will help students prepare for the Physics GRE Subject Test, as efficiently as possible over the period from September thru early November 2010. This web page will be the primary source for materials, schedules, and links to solutions. Information regarding the GRE subject test in physics: The test consists of 100 multiple choice questions.
Materials for the GRE Prep course: The following materials are suggestion to aid your studying: Purchase a copy of "The Physics Companion" by A.C. The Feynman Lectures on Physics. Physics Help and Math Help - Physics Forums. RELATE MechanicsWIKI Home - Modeling Applied to Problem Solving - MIT Wiki Service. Skip to end of metadataGo to start of metadata html: Security restricted macro is not allowed.
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