All sites of Physics

Prague Relativity Group Prague Relativity Group
Prague Relativity Group- Contains a brief history of relativity in Prague, as well as information about members, seminars and publications. ...
Astrophysics and Relativity Group at the Racah Institute of Physics Astrophysics and Relativity Group at the Racah Institute of Physics
Astrophysics and Relativity Group at the Racah Institute of Physics- Relativity group at The Hebrew University of Jerusalem. Research interests include cosmology and general relativity; site offers information about grou ...
Gravity Theory Group at the University of Maryland Gravity Theory Group at the University of Maryland
Gravity Theory Group at the University of Maryland- Includes information about the group's members, the PhD program, seminars, and available positions. Research topics include the cosmology of the early universe, numeric ...
TAPIR Group at Caltech TAPIR Group at Caltech
TAPIR Group at Caltech- Theoretical AstroPhysics Including Relativity; includes information about group members, research topics and opportunities, seminars, and publications. Research topics include compact objects, cos ...
Gravity Group at the University of Massachusetts, Dartmouth Gravity Group at the University of Massachusetts, Dartmouth
Gravity Group at the University of Massachusetts, Dartmouth- Group specializes in black hole physics and quantum cosmology; page gives list of group members and external links. ...
Relativistic Astrophysics Department at Sternberg Astronomical Institute Relativistic Astrophysics Department at Sternberg Astronomical Institute
Relativistic Astrophysics Department at Sternberg Astronomical Institute- Relativity group at Moscow State University. Pages give information on staff members, the group's history, and seminars. Research includes the phy ...
QMUL Relativity Group QMUL Relativity Group
QMUL Relativity Group- Pages of the Cosmology, Gravitation and Relativity Group at Queen Mary, University of London, with information on the group's members, research and PhD projects. The group's focus is on various asp ...
Gravitational Physics Group, Vienna University Gravitational Physics Group, Vienna University
Gravitational Physics Group, Vienna University- Includes information about the group's location and members. Research is in mathematical and numerical classical relativity. ...
Max Planck Institute for Gravitational Physics (Albert Einstein Institute) Max Planck Institute for Gravitational Physics (Albert Einstein Institute)
Max Planck Institute for Gravitational Physics (Albert Einstein Institute)- Institute of the Max Planck Society, located in Potsdam and Hannover. Research topics are mathematical relativity, gravitational waves, numerica ...
CarpetCode CarpetCode
CarpetCode- A mesh refinement driver for the Cactus code; the primary application is the simulation of black hole spacetimes. ...
Form Symbolic Manipulation System Form Symbolic Manipulation System
Form Symbolic Manipulation System- A free software package for manipulating tensors (abstract index notation) and other multi-component objects; highly suitable for calculations in general relativity and related theories ...
GRTensorII GRTensorII
GRTensorII- A computer algebra package for performing differential geometry calculations. Demonstrations of the package's applications to general relativity. ...
LORENE (Langage Objet pour la RElativite NumeriquE) LORENE (Langage Objet pour la RElativite NumeriquE)
LORENE (Langage Objet pour la RElativite NumeriquE)- Provides a set of C++ classes to solve various problems arising in numerical relativity and other areas of computational astrophysics. ...
openGR openGR
openGR- An open framework for large numerical simulations in general relativity. ...
Riemann Package for Maple Riemann Package for Maple
Riemann Package for Maple- Package written in Maple for calculating tensor components in General Relativity and performing some abstract tensor manipulation; suitable for calculations in general relativity and for quantu ...
Whisky Whisky
Whisky- A code to evolve the equations of hydrodynamics in curved spacetime (relativistic numerical hydrodynamics). ...
The Cactus Code The Cactus Code
The Cactus Code- A modular manageable high-performance 3D tool for Numerical Relativity. ...
Ricci Ricci
Ricci- A Mathematica package for doing tensor calculations in differential geometry and general relativity. ...
Wikipedia: Special Relativity Wikipedia: Special Relativity
Wikipedia: Special Relativity- Online encyclopedia article. ...
Don K's Laser Page Don K's Laser Page
Don K's Laser Page- So you want a working diode laser? Gives information on laser diode pointers. ...
How Do You Add Velocities in Special Relativity? How Do You Add Velocities in Special Relativity?
How Do You Add Velocities in Special Relativity?- Here is the formula for adding velocities in special relativity when motion occurs in a single direction. ...
University Lectures on Special Relativity University Lectures on Special Relativity
University Lectures on Special Relativity- Lecture notes on Special Relativity, prepared by J. D. Cresser, Department of Physics, Macquarie University. 44 pages. ...
Synchronization Gauges and the Principles of Special Relativity Synchronization Gauges and the Principles of Special Relativity
Synchronization Gauges and the Principles of Special Relativity- Synchronization functions set the mathematical clocks represented by the Lorentz transformation and resetting these clocks mathematically only produces a t ...
Quaternions in University-Level Physics Considering Special Relativity Quaternions in University-Level Physics Considering Special Relativity
Quaternions in University-Level Physics Considering Special Relativity- The quaternions are an expansion of complex numbers and show close relations to numerous physically fundamental concepts (e.g. Pauli Matrices). ...
Santa at Nearly the Speed of Light Santa at Nearly the Speed of Light
Santa at Nearly the Speed of Light- An estimate of the speed and distances covered by Santa Claus on Christmas night. The physics is unassailable. The article is hosted on the Fermi National Accelerator Laboratory websit ...
A Derivation of the Lorentz Transformation From a Simple Definition of Time A Derivation of the Lorentz Transformation From a Simple Definition of Time
A Derivation of the Lorentz Transformation From a Simple Definition of Time- The fundamental equations of special relativity are derived with only high school algebra and toy universes consisting of moving rulers. ...
Einstein Light Einstein Light
Einstein Light- A multimedia tutorial on Special Relativity. The introductory level takes 10 minutes, but has links to over 40 explanatory pages giving greater depth and breadth. ...
Time Dilation Time Dilation
Time Dilation- The gamma factor and time dilation can be derived using a very simple clock. ...
Special Relativity Special Relativity
Special Relativity- Tutorial explains about the postulates, paradox, simulaneity, time dilation, Lorentz transformation constructions, spacetime wheel, and the Fitzgerald-Lorentz contraction. Page includes some animated ...
Generalized Relativistic Velocity Addition with Spacetime Algebra Generalized Relativistic Velocity Addition with Spacetime Algebra
Generalized Relativistic Velocity Addition with Spacetime Algebra- The general problem of relativistic addition of velocities – and the successive application of noncollinear Lorentz boosts – is addressed. ...
E=mc² E=mc²
E=mc²- An article from the Wikipedia encyclopedia. ...
Geometric Algebra for Physicists Geometric Algebra for Physicists
Geometric Algebra for Physicists- This is chapter 1 of a book by Chris Doran and Anthony Lasenby on geometric algebra, which is the natural mathematics of spacetime. ...
Relativistic Force Transformation Relativistic Force Transformation
Relativistic Force Transformation- Formulas relating one and the same force in two inertial frames of reference are derived directly from the Lorentz transformation of space and time coordinates. ...
Lorentz Contraction and Accelerated Systems Lorentz Contraction and Accelerated Systems
Lorentz Contraction and Accelerated Systems- Lorentz contraction in systems undergoing constant proper acceleration is proven to be completely self-consistent in the context of special relativity. ...
On the Electrodynamics of Moving Bodies On the Electrodynamics of Moving Bodies
On the Electrodynamics of Moving Bodies- Albert Einstein's first paper on relativity, translated here from Annalen der Physik vol XVII 1905 p. 891-921, is of historical interest. ...
Deriving Relativistic Momentum and Energy Deriving Relativistic Momentum and Energy
Deriving Relativistic Momentum and Energy- Expressions for momentum and energy of a relativistic particle may be derived from the composition law for velocities along one spatial dimension. ...
Deriving Relativistic Momentum and Energy. II. Deriving Relativistic Momentum and Energy. II.
Deriving Relativistic Momentum and Energy. II.- The usual relativistic expressions for momentum and kinetic energy are generalized from the one-dimensional to the three-dimensional case. ...
Nothing but Relativity Nothing but Relativity
Nothing but Relativity- There are many ways to derive the Lorentz transformation without invoking Einstein's constancy of light postulate. The path preferred in this paper restates a simple, established approach. ...
The Twin Paradox in a Spatially Closed and Bounded Universe The Twin Paradox in a Spatially Closed and Bounded Universe
The Twin Paradox in a Spatially Closed and Bounded Universe- Spatially compact spacetimes break global Lorentz invariance and define absolute inertial frames of reference. ...
Sagnac Effect, Twin Paradox and Space-Time Topology Sagnac Effect, Twin Paradox and Space-Time Topology
Sagnac Effect, Twin Paradox and Space-Time Topology- When viewed with an alternative synchronization convention, the Sagnac effect on a rotating disk is purely topological and the rim of the disk is essentially an inerti ...
Space Measurements on a Rotating Platform Space Measurements on a Rotating Platform
Space Measurements on a Rotating Platform- The age-old puzzling problem of Lorentz contraction on a rotating platform, i.e., Ehrenfest's paradox, is explained in its proper mathematical context. ...
Imaginary In All Directions Imaginary In All Directions
Imaginary In All Directions- There is a preferred algebra of quaternions and complex numbers that is ideally suited to express the equations of special relativity and classical electrodynamics. ...
The Special Theory of Relativity The Special Theory of Relativity
The Special Theory of Relativity- Self-tutorial with short essays, questions and answers. ...
Wikipedia: Introduction to Special Relativity Wikipedia: Introduction to Special Relativity
Wikipedia: Introduction to Special Relativity- Encyclopedia article giving a brief outline of the basic concepts of special relativity (including simple formulas). ...
Understanding Special Relativity Understanding Special Relativity
Understanding Special Relativity- Brief explanation of special relativity, using no more than high-school level mathematics; includes an account of the twin paradox, some remarks on faster-than-light travel, and some mat ...
Derivation of the Lorentz Transformation Derivation of the Lorentz Transformation
Derivation of the Lorentz Transformation- This derivation uses the group property of the Lorentz transformations, which means that a combination of two Lorentz transformations also belongs to the class Lorentz transforma ...
A Special Relativity Paradox: The Barn and the Pole A Special Relativity Paradox: The Barn and the Pole
A Special Relativity Paradox: The Barn and the Pole- The answer to the famous barn and the pole paradox is that the two doors are never closed at the same time in the runner's frame of reference. ...
The Doppler Shift Equation For An Accelerating Frame of Reference The Doppler Shift Equation For An Accelerating Frame of Reference
The Doppler Shift Equation For An Accelerating Frame of Reference- The exact equation for the Doppler shift in a uniformly accelerating rocket is derived in two different ways. The first method depends on a functional eq ...
Simple Derivation of the Special Theory of Relativity Without the Speed of Light Axiom Simple Derivation of the Special Theory of Relativity Without the Speed of Light Axiom
Simple Derivation of the Special Theory of Relativity Without the Speed of Light Axiom- Special relativity may be derived just from assuming isotropy, homogeneity and a principle of relativity, without the need to consid ...
Uniform Acceleration Uniform Acceleration
Uniform Acceleration- This paper analyzes several simple uniform acceleration problems, including the paradox of John Bell. ...

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