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Physics of Relativity

Physics group project

Sami McKenzie

on 12 November 2012

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Transcript of Physics of Relativity

Physics of Relativity 7. Black holes are what happens when stars go supernova and collapse on themselves. They have zero volume and infinite density. They are a place that's gravitational force is so strong not even light can escape it. 4. What role does the equivalence of the inertial and gravitational properties of mass play in the development of general relativity? 6. The Schwarzschild radius gives the radius at which the Schwarzschild metric becomes singular, and is therefore the "size" of a black hole. Gravity bends light by the presence of matter. In general relativity, the presence of matter (energy density) can curve space-time or bend , the path of a light ray as a result. This process is called gravitational lensing and in many cases can be described in analogy to the deflection of light by (ex. glass) lenses in optics. Many useful results for cosmology have come out of using this property of matter and light. 10. It is called the general theory of relativity and not the general hypothesis of relativity because a hypothesis is something that is going to be tested and proven either true or mistaken, whereas a theory is an experiment that has been carried out and shown to work with loopholes in it. When the planet(star of a black hole...or anything massive)spins it pulls space and time around with it, an action known as " Frame dragging." The fabric of space-time twists like a vortex. Einstein tell us that all gravitational forces correspond to bending of space-time; the "twist" is gravitomagnetism. Without mass space-time fabric would not exist. Before Newton, for nearly 1,000 years, Aristotle's view of a stationary Earth at the center of revolving universe, dominated the natual philosophy. In 1543, Nicolaus Copernicus theoried that the Earth, along with other planets, orbited the sun. His theory would take more than a century to become widely accepted. Galileo found evidence to supposrt Copernicus' heliocentric theory. Johannes Kepler also used Copernican's theory to publish a series of laws that describe the orbits of the planets around the sun. The equivalence of the inertial and gravitational properties of mass plays a crucial role in the development of general relativity. General Relativity only makes sense if every object has the same gravitational mass and inertial mass. where G is the gravitational constant, M is the mass of the black hole, and c is the speed of light. ... And a law is a theory that has been proven without fail and with no opposition or exception. 3. The major contribution of Henry Cavendish is the gravitational constant of G (6.67x10^-11) Cavendish's primary experiment was when he observed how two spheres acted when they were in the presence of massive lead spheres, because all objects with mass exert some gravitational force, as compared to when the smaller spheres were just subjected to the gravitational force of the earth. ~ Sami ~ Sami 10. Some predictions of general relativity that have been verified are: "the warping of space time due to a massive body, and frame-dragging, which results from a spinning mass pulling space-time around it." ~ Sami ~ Sami rSchwarzschild =2GM/ C ^2 ~ Haleigh ~Haleigh -Taylor 9. What are worm holes,
and are they real? A worm hole is a mathematical solution to Einstein's relativistic equation for gravity in which two parts of space-time may be joined together. Wormholes are allowed to exist in the math of "General Relativity", which is our best description of the Universe, although there is no hard evidence of them. -Kass -Kass ~Taylor Newton was born in 1642 in Lincolnshire, England. He was sent to Cambridge to study to become a preacher. Newton was forced to leave Cambridge because of the plague, and it was during this period he made some of most his significant discoveries. Newton suffered a mental breakdown in 1675 for four years. Newon had no personal life and was a hermit, who was insecure and outbursts of violent tempers. Newton wrote Book I of Principia, where he opened with the three laws of motion. Book II had his new scientific philosophy. And Book III concisted of applications of his dynamics including an explanation for tides and a theory of lunar motion. he formulated the classical theories of mechanics and optics and invented calculus. The apple helped Newton come up with the idea of gravity, and made him think of how it related to the planets, and he then explained why the planets move as the did around the sun and the force that is responsible of it all, gravity. http://helios.gsfc.nasa.gov/qa_sp_sl.











http://space.about.com/b/2011/05/12/nasa-confirms-two-predictions-of-general-relativity.htm ~all Works Cited: By: Sami, Kassidy, Haleigh, and Texas Ranger (aka Taylor) 5.How does gravity correspond to the bending of space-time fabric? The exterior solution for such a black hole is know as the Schwarzschild solution (or Schwarzschild metric), and is an exact unique solution to the Einstien field of equations of generral relativity. 8.How does gravity bend light? What is gravitational lensing ~Haleigh
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