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AERO 721 Gravity - Essay Example

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The author emphasizes the field theoretic aspects of gravitation and the deep analogies shared between gravitation and other different areas in physics. This theory-centered text which is both clear and concise includes the simplest experimental facts…
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AERO 721 Gravity
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Download file to see previous pages The simplest experimental facts, which later goes on to explain the corresponding differential equations, theoretical constructs such as energy, momentum and stress and several other applications. This unique textbook which is both clear and concise is a combination of a novel approach together with a simple down-to-earth treatment of electromagnetism and focuses mainly on basic principles rather than on applications while avoiding any abstractions. A physical theory, the classical field theory describes in detail how one or more physical fields correspondingly interacts with matter. Any physical quantity, in a given point of space and time, represents a physical field. A good example of this would be measuring the velocity1 of wind over a region by assigning vectors at certain points. This is very useful for depicting weather forecasts in different regions.
The term “classical” is used to differentiate it from other field theories using quantum2 mechanics. The “classical field theory” is essentially reserved for the physical theories involving gravitation and electromagnetism. Classical field theories are categorized both as relativistic and non – relativistic.
In the Non- relativistic category, the vector force fields are considered to be the simplest physical fields. Faraday’s lines of force describing an electric field were the first time that these fields were taken seriously. The same method was used to describe the fields of gravitation. According to Newtonian gravitation, the classical field theory described the force of gravitation “as a mutual interaction between two masses.” However, it was found that the Newtonian Gravitation was inconsistent with regard to special relativity and hence a new theory of gravitation which was named general relativity was put together by Albert Einstein. According to Einstein’s theory, gravitation is treated as a geometric phenomenon (curved spacetime) that are caused by masses.  ...Download file to see next pagesRead More
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