gravity with some other force‚ such as electromagnetism or aerodynamic lift. Anti-gravity is a recurring concept in science fiction. In Newton’s law of universal gravitation‚ gravity was an external force transmitted by unknown means. Under general relativity‚ anti-gravity is impossible except under contrived circumstances. "Anti-gravity" is often used colloquially to refer to devices that look as if they reverse gravity even though they operate through other means‚ e.g. Anti-gravity is a concept
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theory of relativity‚ scientists were able to find out that when so much matter is concentrated in a small region‚ gravitational forces are so strong and space so extremely warped that light is no longer just being bent‚ but trapped inside the object (see image on the left). Although the concept of black holes is relatively old‚ the findings and research on them are quite new. After being ignored for almost a century‚ the idea of black holes was again being explored thanks to Einstein’s general theory
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References: http://www.damtp.cam.ac.uk/user/gr/public/bh_home.html http://antwrp.gsfc.nasa.gov/htmltest/rjn_bht.html http://cosmology.berkeley.edu/Education/BHfaq.html Black Holes and Time Warps‚ By Kip S. Thorne Black Holes: Introduction to General Relativity‚ By Edwin Taylor‚ John Archiblad Wheeler
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Biography of Michio Kaku Michio Kaku (born January 24‚ 1947) is an American theoretical physicist. At the National Science Fair in Albuquerque‚ N.M.‚ he attracted the attention of physicist Edward Teller‚ who took Kaku as a protégé‚ awarding him the Hertz Engineering Scholarship. Kaku received a B.S. degree summa cum laude from Harvard University in 1968 where he placed first in his physics class. He went on to attend the Berkeley Radiation Laboratory at the University of California‚ Berkeley and
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Albert Einstein was a physicist of the 20th century. During his research‚ he developed both theories of general and special relativity. These discoveries and contributions to science led him to receive the nobel Prize for physics. Some say his discoveries make him the most influential person of the 20th century for his field of study. Albert Einstein was born in Ul‚ Württemberg‚ Germany on March 14‚ 1879. He was raised in a Jewish household. He had one brother‚ Hermann‚ and one sister‚ Maja. Elementary
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What is the mysterious dark energy that’s causing the expansion of the universe to accelerate? Is it some form of Einstein’s famous cosmological constant‚ or is it an exotic repulsive force‚ dubbed "quintessence‚" that could make up as much as three-quarters of the cosmos? Scientists from Lawrence Berkeley National Laboratory (Berkeley Lab) and Dartmouth College believe there is a way to find out. | | | | The SuperNova/Acceleration Probe‚ SNAP‚ is a satellite designed to study dark energy
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question? Well‚ first we must discuss the major problem that loomed with developing such a theory. To correlate all things in the universe‚ one must first realize the two pillars of modern physics. First is Einstein’s general relativity and then the concept of quantum mechanics. Relativity provides a framework for understanding the universe at a large scale‚ we are talking about stars‚ galaxies and even larger objects(galaxy clusters‚ black holes even). Quantum mechanics does the opposite‚ provides a
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density‚ this is also known as singularity‚ a collapsed core (Smith‚ H. R.). Black holes are also able to merge with other black holes to form a super massive black hole‚ this is present in the centres of most galaxies (Wikipedia). Source: Cambridge Relativity The process at which black holes are made simply only involve the cores of stars. The size of the core of the star is essential in determining whether a dying star will form into a black hole‚ a white dwarf
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result‚ many others have verified the effect through various methods. If his theory of black hole radiation is correct‚ then black holes are expected to emit a thermal spectrum of radiation‚ and thereby lose mass‚ because according to the theory of relativity mass is a form of energy (E = mc2). Black holes will shrink and evaporate over time. The temperature of this spectrum (Hawking temperature) is proportional to the surface gravity of the black hole‚ which for a Schwarzschild black hole is inversely
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is represented constant number of light speed. E = mc2 theory of relativity theory and quantum mechanics are two basic branch of modern physics ‚ classical mechanics laid the foundation of classical physics ‚ but for high speed objects and microscopic condition of objects‚ Newton’s laws are no longer applicable. An important conclusion of the theory of relativity is talking about mass and energy. Based on the special relativity ‚mass and energy are not interchangeable‚ while in classical mechanics
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