Articles related to "General Relativity"
The Legacy of General Relativity
When Einstein published his General Theory of Relativity, surely even he could not be fully aware of the profound effect it would have on the scientific community.
general relativity • results of general relativity • albert einstein • what is general relativity • curved spacetime
When Einstein published his General Theory of Relativity, surely even he could not be fully aware of the profound effect it would have on the scientific community.
general relativity • results of general relativity • albert einstein • what is general relativity • curved spacetime
The Dark Side III
About 97% of what makes the Universe is unknown, a combination of dark matter and dark energy. This is not acceptable as is, neither the disfunctional relationship of General Relativity and Quantum Mechanics.
dark matter • dark energy • einstein • hubble • machos
About 97% of what makes the Universe is unknown, a combination of dark matter and dark energy. This is not acceptable as is, neither the disfunctional relationship of General Relativity and Quantum Mechanics.
dark matter • dark energy • einstein • hubble • machos
Einstein's General Relativity
Einstein's general theory of relativity expanded on the special theory, explained gravity, and predicted phenomena such as black holes and the expanding universe.
einstein • general relativity • theory of relativity • gravity • principle of equivalence
Einstein's general theory of relativity expanded on the special theory, explained gravity, and predicted phenomena such as black holes and the expanding universe.
einstein • general relativity • theory of relativity • gravity • principle of equivalence
Gravitational Lens and Dark Matter
Gravitational lenses, predicted by Einstein's general relativity, provide an important experimental confirmation of this theory and help astronomers find dark matter.
gravitational lens • quasars • galaxies • general relativity • einstein
Gravitational lenses, predicted by Einstein's general relativity, provide an important experimental confirmation of this theory and help astronomers find dark matter.
gravitational lens • quasars • galaxies • general relativity • einstein
Gravity and General Relativity
In essence, Einstein's General Theory of Relativity was an entirely new theory of gravity, replacing the centuries-old theories of Isaac Newton.
curved spacetime • gravity • general relativity • what is gravity • the equivalence principle
In essence, Einstein's General Theory of Relativity was an entirely new theory of gravity, replacing the centuries-old theories of Isaac Newton.
curved spacetime • gravity • general relativity • what is gravity • the equivalence principle
GUTS and Inflation in the Big Bang
Shortly after the initial big bang, the universe went through a period of very rapid expansion called the inflationary period.
big bang theory • universe • general relativity • guts • inflationary era
Shortly after the initial big bang, the universe went through a period of very rapid expansion called the inflationary period.
big bang theory • universe • general relativity • guts • inflationary era
Relativity and Bending Light
While many physicists would have believed it to be impossible, Albert Einstein's prediction that light could be bent by gravity acted to change the course of physics.
bending of light • gravitational bending of light • light bending in general relativity • why does gravity cause light to bend • albert einstein
While many physicists would have believed it to be impossible, Albert Einstein's prediction that light could be bent by gravity acted to change the course of physics.
bending of light • gravitational bending of light • light bending in general relativity • why does gravity cause light to bend • albert einstein
The Math of General Relativity
While the world rightly perceives Albert Einstein as having been a brilliant physicist, the mathematics of General Relativity were so difficult as to be beyond even him.
general relativity • math of general relativity • tensor calculus • what is a tensor • absolute differential calculus
While the world rightly perceives Albert Einstein as having been a brilliant physicist, the mathematics of General Relativity were so difficult as to be beyond even him.
general relativity • math of general relativity • tensor calculus • what is a tensor • absolute differential calculus
The Planck Time and the Big Bang
In the big bang theory, the Planck time is the first miniscule fraction of a second after the initial big bang. The universe had just come into being.
big bang theory • universe • planck time • cosmic background radiation • hubble plot
In the big bang theory, the Planck time is the first miniscule fraction of a second after the initial big bang. The universe had just come into being.
big bang theory • universe • planck time • cosmic background radiation • hubble plot
Three Great Physics Theories
Isaac Newton invented calculus to describe things that are moving or changing in some way. This was just the beginning of more new and exciting physics theories to come.
general relativity • theory of relativity • quantum theory • heisenberg • uncertainty principle
Isaac Newton invented calculus to describe things that are moving or changing in some way. This was just the beginning of more new and exciting physics theories to come.
general relativity • theory of relativity • quantum theory • heisenberg • uncertainty principle
Euclidean v Non-Euclidean Geometry
While most people are far more familiar with the basic principles of Euclidean geometry, scientists have come to discover that the shape of our universe is non-Euclidean.
euclid of alexandria • greek mathematicians • euclidean geometry • non-euclidean geometry • the shape of the universe
While most people are far more familiar with the basic principles of Euclidean geometry, scientists have come to discover that the shape of our universe is non-Euclidean.
euclid of alexandria • greek mathematicians • euclidean geometry • non-euclidean geometry • the shape of the universe
Predicting the Expanding Universe
Hubble discovered the expansion of the universe, but De Sitter, Friedman, & Lemaitre used Einstein's general relativity to predict the expanding universe & the big bang.
expansion of the universe • general relativity • einstein • de sitter • friedman
Hubble discovered the expansion of the universe, but De Sitter, Friedman, & Lemaitre used Einstein's general relativity to predict the expanding universe & the big bang.
expansion of the universe • general relativity • einstein • de sitter • friedman
Nature's magnifying glass
Predicted by General Relativity, gravitational lenses catapulted Einsteins's reputation as much as they are handy tools today to tackle one of Cosmology thorniest issues, the discovery and census of dark matter.
einstein • general relativity • black hole • astronomy • astrophyisics
Predicted by General Relativity, gravitational lenses catapulted Einsteins's reputation as much as they are handy tools today to tackle one of Cosmology thorniest issues, the discovery and census of dark matter.
einstein • general relativity • black hole • astronomy • astrophyisics
Origin of the Idea of Black Holes
Michell first suggested the idea of black holes in 1783. Schwarzschild's exact solution to Einstein's general relativity equation led to the prediction of black holes.
black holes • corps obscura • schwarzschild's solution to einstein's equations • general relativity • laplace
Michell first suggested the idea of black holes in 1783. Schwarzschild's exact solution to Einstein's general relativity equation led to the prediction of black holes.
black holes • corps obscura • schwarzschild's solution to einstein's equations • general relativity • laplace
OUR black hole. Part I
Black holes are strange beasts, small wonder they lure public imagination and feed Sci-Fi writers inspiration with all sort of wild tales.
black hole • general relativity • einstein • hawking • wheeler
Black holes are strange beasts, small wonder they lure public imagination and feed Sci-Fi writers inspiration with all sort of wild tales.
black hole • general relativity • einstein • hawking • wheeler
The Black Hole War - A Review
Susskind's "Battle with Stephen Hawking to Make the World Safe for Quantum Mechanics" is a fascinating, if mind-boggling, read.
black hole war • quantum physics • string theory • introduction quantum mechanics • leonard susskind
Susskind's "Battle with Stephen Hawking to Make the World Safe for Quantum Mechanics" is a fascinating, if mind-boggling, read.
black hole war • quantum physics • string theory • introduction quantum mechanics • leonard susskind
The Equivalence Principle
When Albert Einstein first realized that gravitational mass and inertial mass were the same thing, the resulting thoughts led him to expanding the theory of relativity.
equivalence principle • general relativity • albert einstein • gravitational and inertial mass equivalence • einstein's happiest thought
When Albert Einstein first realized that gravitational mass and inertial mass were the same thing, the resulting thoughts led him to expanding the theory of relativity.
equivalence principle • general relativity • albert einstein • gravitational and inertial mass equivalence • einstein's happiest thought
The Mathematics of Black Holes
How massive does an object have to be in order to be transformed into a black hole? There is a very simple way to find this out using a standard algebraic equation.
schwarzschild radius • black holes • albert einstein • general relativity • escape velocity
How massive does an object have to be in order to be transformed into a black hole? There is a very simple way to find this out using a standard algebraic equation.
schwarzschild radius • black holes • albert einstein • general relativity • escape velocity
What is Differential Geometry?
Differential Geometry is a form of advanced mathematics which deals with the properties of continuous manifolds in multiple dimensions, using basic tools of calculus.
differential geometry • differential calculus • integral calculus • rate of change • displacement
Differential Geometry is a form of advanced mathematics which deals with the properties of continuous manifolds in multiple dimensions, using basic tools of calculus.
differential geometry • differential calculus • integral calculus • rate of change • displacement
Stephen Hawking - A Modern Scientific Genius
Stephen Hawking is a best-selling author, the Lucasian Professor of Mathematics at Cambridge, and arguably the smartest man in the world.
hawking • quantum physics • black hole • singularity • big bang
Stephen Hawking is a best-selling author, the Lucasian Professor of Mathematics at Cambridge, and arguably the smartest man in the world.
hawking • quantum physics • black hole • singularity • big bang
Lie Groups
The term "lie group" (pronounced "lee") refers to certain classifications of manifolds - a highly technical, difficult form of mathematics, but one with great pragmatic
lie group • lie algebra • differential calculus • differentiability • continuity
The term "lie group" (pronounced "lee") refers to certain classifications of manifolds - a highly technical, difficult form of mathematics, but one with great pragmatic
lie group • lie algebra • differential calculus • differentiability • continuity
What is a Black Hole?
The phenomena known as black holes are some of the most studied elements of the universe, yet they still retain a fascinating amount of mystery.
what is a black hole • albert einstein • general relativity • john michell • schwarzschild radius
The phenomena known as black holes are some of the most studied elements of the universe, yet they still retain a fascinating amount of mystery.
what is a black hole • albert einstein • general relativity • john michell • schwarzschild radius
The Dark Side I
In the first part, we present the evolution of cosmology leading to the postulation of dark matter, the Universe Age Crisis, and the lines of research pursued to solve it.
dark matter • dark energy • einstein • hubble • machos
In the first part, we present the evolution of cosmology leading to the postulation of dark matter, the Universe Age Crisis, and the lines of research pursued to solve it.
dark matter • dark energy • einstein • hubble • machos
Nuclear Density, Stellar Mass: Neutron Stars and Pulsars Continu
astronomy • supernovae • binary pulsars
astronomy • supernovae • binary pulsars
The Subject is Physics
Explore the dynamics of nature from the microscopic to the macroscopic on the Internet.
physics • physical science • cat scans • mri • laser
Explore the dynamics of nature from the microscopic to the macroscopic on the Internet.
physics • physical science • cat scans • mri • laser
The Universe in a Nutshell
Stephen Hawking followed up A Brief History of Time with a book that took on the other aspect of his work, space, bringing theoretical physics within reach of the layman.
universe in a nutshell • nature of existence • stephen hawking book • stephen hawking universe nutshell • stephen hawking theoretical phsyics
Stephen Hawking followed up A Brief History of Time with a book that took on the other aspect of his work, space, bringing theoretical physics within reach of the layman.
universe in a nutshell • nature of existence • stephen hawking book • stephen hawking universe nutshell • stephen hawking theoretical phsyics
5 Greatest Scientists in History
No bigger impact can be felt by these men who created or changed the scientific world. These great scientific thinkers affected the thinking of the human race as well.
top 5 scientists • evolution • physics • relativity • chemistry
No bigger impact can be felt by these men who created or changed the scientific world. These great scientific thinkers affected the thinking of the human race as well.
top 5 scientists • evolution • physics • relativity • chemistry
Black Hole Singularity
Inside the event horizon or Schwarzschild radius of a static isolated black hole the mass of the collapsed star is compressed into a singularity point.
black holes • singularity • schwarzschild radius • event horizon • naked singularity
Inside the event horizon or Schwarzschild radius of a static isolated black hole the mass of the collapsed star is compressed into a singularity point.
black holes • singularity • schwarzschild radius • event horizon • naked singularity
Calculating Density of Black Holes
To form a black hole, matter must be compressed to such high densities that it is smaller than the event horizon or Schwarzschild radius.
black hole • event horizon • schwarzschild radius • density • energy density
To form a black hole, matter must be compressed to such high densities that it is smaller than the event horizon or Schwarzschild radius.
black hole • event horizon • schwarzschild radius • density • energy density
Einstein-Rosen Bridge
Science fiction speaks frequently about wormholes and time travel. Einstein's theories allowed for some versions of time and space travel, under certain conditions.
einstein rosen bridges • time travel • casimir effect • wormholes • kerr ring singularity
Science fiction speaks frequently about wormholes and time travel. Einstein's theories allowed for some versions of time and space travel, under certain conditions.
einstein rosen bridges • time travel • casimir effect • wormholes • kerr ring singularity
Introduction to Topology
Topology is the study of the mathematics of various shapes; it defines their features and the possible manipulations they can undergo while retaining their shape.
topology • donut into coffee cup • homeomorphism • leonard euler • seven bridges of konigsberg
Topology is the study of the mathematics of various shapes; it defines their features and the possible manipulations they can undergo while retaining their shape.
topology • donut into coffee cup • homeomorphism • leonard euler • seven bridges of konigsberg
Mach's Principle
Mach's Principle states that 'mass there influences inertia here'.
mach's principle • ernst mach • mach principle • physics principle • momentum principle
Mach's Principle states that 'mass there influences inertia here'.
mach's principle • ernst mach • mach principle • physics principle • momentum principle
Newton's Law of Gravitation
Newton's law of gravitation is one of the most powerful ideas in physics, explaining much of the behaviour of the physical world.
newton's law of gravitation • newton's law of universal gravitation • physics • gravity • newton law of gravity
Newton's law of gravitation is one of the most powerful ideas in physics, explaining much of the behaviour of the physical world.
newton's law of gravitation • newton's law of universal gravitation • physics • gravity • newton law of gravity
Our Universe Could be One of Many
Theorists believe there is a strong possibility other universes exist. Many universe 'bubbles' could lurk nearby and crash into each other.
bubble universes • expanding universe • multiverses • one of many universes • evidence of a multiverse
Theorists believe there is a strong possibility other universes exist. Many universe 'bubbles' could lurk nearby and crash into each other.
bubble universes • expanding universe • multiverses • one of many universes • evidence of a multiverse
Schrödinger's Cat Paradox
Quantum physics presents a complex view of the universe. Erwin Schrödinger criticized the theory by posing one of the most famous thought experiments in modern physics.
schrödinger • quantum • cat • paradox • physics
Quantum physics presents a complex view of the universe. Erwin Schrödinger criticized the theory by posing one of the most famous thought experiments in modern physics.
schrödinger • quantum • cat • paradox • physics
The End of the Universe
No one is sure how the end will come to the Universe. However, some interesting theories have emerged that could explain how it all might happen.
end of the universe theories • the big rip theory • multiverse • the universe • cyclic universe
No one is sure how the end will come to the Universe. However, some interesting theories have emerged that could explain how it all might happen.
end of the universe theories • the big rip theory • multiverse • the universe • cyclic universe
The Parallel Universe
Having rejected the idea for years, some scientists are now saying "yes" to the theory of infinite parallel worlds.
parallel universe theory • parallel universe • parallel universes • multiverse theory • many worlds theory
Having rejected the idea for years, some scientists are now saying "yes" to the theory of infinite parallel worlds.
parallel universe theory • parallel universe • parallel universes • multiverse theory • many worlds theory
Was the Big Bang an Explosion?
The "Big Bang" is commonly described as an explosion, but this is not really a good analogy. In fact, the universe was created through an expansion of space.
big bang • theory • explosion • origin of universe • primeval fireball
The "Big Bang" is commonly described as an explosion, but this is not really a good analogy. In fact, the universe was created through an expansion of space.
big bang • theory • explosion • origin of universe • primeval fireball
World's Biggest Gun Set to Fire September 2008
Straddling the Franco-Swiss border near Geneva, 50 meters underground and an astonishing 17 miles long; the Large Hadron Collider (LHC) is easily the World's biggest gun.
world's biggest gun • lhc could destroy earth • discovery of higgs bozon • recreate the big bang • lhc will fire in september
Straddling the Franco-Swiss border near Geneva, 50 meters underground and an astonishing 17 miles long; the Large Hadron Collider (LHC) is easily the World's biggest gun.
world's biggest gun • lhc could destroy earth • discovery of higgs bozon • recreate the big bang • lhc will fire in september
An Explanation of Pi
The number pi has intrigued great thinkers for millenia. Only recently have mathematicians and scientists been able to truly understand how it relates to nature.
pi • ancient mathematics • history of pi • explanation of pi • what is pi
The number pi has intrigued great thinkers for millenia. Only recently have mathematicians and scientists been able to truly understand how it relates to nature.
pi • ancient mathematics • history of pi • explanation of pi • what is pi
Complex Numbers
Complex numbers are numbers which are combinations of any real number plus the imaginary number. While difficult to comprehend, imaginary numbers are quite real.
complex numbers • imaginary numbers • real numbers • real number line • imaginary number line
Complex numbers are numbers which are combinations of any real number plus the imaginary number. While difficult to comprehend, imaginary numbers are quite real.
complex numbers • imaginary numbers • real numbers • real number line • imaginary number line
Steady State Cosmology
The steady state theory was a mid 20th century alternative to the big bang theory. It suggested that there was no moment of creation. The universe has always existed.
steady state theory • big bang theory • cosmology • cosmological principle • perfect cosmological principle
The steady state theory was a mid 20th century alternative to the big bang theory. It suggested that there was no moment of creation. The universe has always existed.
steady state theory • big bang theory • cosmology • cosmological principle • perfect cosmological principle
Is Time Travel Possible?
Time Travel has been a favorite subject for science fiction enthusiasts. Yet scientists do have an idea on how it can be done. Some of these ideas will be discussed.
time travel • possibility of time travel • travel to the future • travel to the past • future
Time Travel has been a favorite subject for science fiction enthusiasts. Yet scientists do have an idea on how it can be done. Some of these ideas will be discussed.
time travel • possibility of time travel • travel to the future • travel to the past • future
Einstein's Errors Were in a Class by Themselves
Physics professor and author Hans Ohanian says Einstein's work was fraught with errors in the details, but his thinking was still decades ahead of all his contemporaries.
albert einstein • hans c. ohanian • einstein’s mistakes • nobel prize • cosmological constant
Physics professor and author Hans Ohanian says Einstein's work was fraught with errors in the details, but his thinking was still decades ahead of all his contemporaries.
albert einstein • hans c. ohanian • einstein’s mistakes • nobel prize • cosmological constant
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