semc said:ok i take back what i said the website is not down
well...i watched the 1st video but really don't understand anything he's talking about...hmm is there any intro to this intro?
, evil physics lectureres lol General Relativity is a theory of gravitation that was developed by Albert Einstein in the early 20th century. It describes how massive objects curve the fabric of space-time, causing objects to move along curved paths.
General Relativity is important because it is the most accurate theory we have for describing how gravity works on a large scale. It has been extensively tested and has been shown to accurately predict the behavior of objects in the universe.
The main principles of General Relativity are the equivalence principle, which states that the effects of gravity are indistinguishable from the effects of acceleration, and the principle of general covariance, which states that the laws of physics should be the same in all frames of reference.
General Relativity differs from Newton's theory of gravity in several key ways. Newton's theory treats gravity as a force acting between two objects, while General Relativity describes it as a curvature of space-time. Additionally, General Relativity can account for the effects of gravity on light and the bending of light around massive objects, while Newton's theory cannot.
General Relativity has many practical applications, including in the field of GPS technology. The satellites used for GPS rely on accurate time measurements, and the precise clocks on board these satellites are affected by the curvature of space-time predicted by General Relativity. Additionally, General Relativity has been used to accurately predict the motion of planets and other objects in the universe, and has been essential in understanding the behavior of black holes.