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Because the orbit of Mercury is an ellipse it has a long axis that points in a particular direction. In Newtonian gravity the direction of this axis doesn't change, but GR predicts it changes by 43 arc-seconds per century. This is a tiny tiny amount.
Dec 19, 2016 · The equations did away with Newton’s theory of gravity and replaced it with curved space and warped time. Within weeks, Karl Schwarzschild found a solution to Einstein’s equations.
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- The Beauty of Invariance
- Problems with Electromagnetism
- Principle of Relativity
- What About Gravity?
- The Road to General Relativity
In the 17th century, Isaac Newton developed a set of equationsthat described the physical properties of the world around us. These equations were very successful, from a description of the flight of a cannonball, to the motion of the planets. They also had a very appealing property: all observers, regardless of whether they are moving or not – i.e....
The 19th century was a time of extensive study of the phenomena of electricity, magnetism and light. In 1865 James Clerk Maxwell published a set of equations that combined all these phenomena into a single phenomenon of “electromagnetism”. Soon after Maxwell’s discovery, people realised that there is something strange when it comes to his equations...
This got Einstein wondering whether the transformation that preserved the structure of Maxwell’s equations was merely a mathematical trick or whether there was something fundamental about it. He wondered whether time and space were absolute, or whether the principle of invariance of the laws of physics should be paramount. In 1905, Einstein decided...
In 1907 Einstein realised that his theory was not complete. The principle of relativity was only applicable to observers moving with a constant velocity. It also did not fit with the Newtonian description of gravity. Einstein, being a patent officer, did not have access to laboratory equipment. To compensate, he had to engage himself in thought exp...
All this reasoning convinced Einstein that the geometry of the spacetime and the physical processes that take place in the spacetime, are related to each other and that one can affect the other. It also led to a striking conclusion: what we perceive as gravity is just a consequence of the motion through the spacetime. The larger the curvature of th...
Nov 25, 2015 · Posted Tue 24 Nov 2015 at 1:59pm, updated Tue 24 Nov 2015 at 4:01pm. Albert Einstein's theory of relativity has been explaining how the universe works for the last 100 years (AFP) abc.net.au/news ...
The orbit of Mercury was shown to be different than what Newton’s theory could describe, but searches for another planet (Vulcan) were unsuccessful. In addition, Albert Einstein’s theory of Special Relativity, published in 1905, was found to be incompatible with Newton’s theory of gravity.
Special relativity is a theory of spacetime and applies to observers moving at constant velocity. General relativity is a theory of gravity and applies to observers that are accelerating. General relativity is broader and includes special relativity, which was published first.
Aug 11, 2021 · In Einstein’s subsequent theory of general relativity (1916), both of these issues were addressed. His theory was a theory of space-time geometry and how mass (and acceleration) distort and interact with that space-time. It was not a theory of gravitational forces.
