Albert Einstein's Theory Of General Relativity

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Einstein 's Theory of General Relativity
Gravitational waves predicted by Albert’s Einstein’s general theory of relativity have been detected directly at last. Einstein was right.
In 1905, Albert Einstein found that the laws of physics are the same for all non-accelerating observers, and that the speed of light in vacuum did not depend on the motion of all the observers. This was the theory of special relativity. It provided a new framework for all of the physics and introduced new concepts of space and time.
Einstein then invested 10 years to include acceleration in the theory and published his theory of general relativity in 1915. In it, he determined that massive objects cause a distortion in space-time, which is felt as gravity.
The Tug
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The force tugging between two bodies depends upon how massive each one is and the distance between them. Even the center of earth pulls you towards it which keeps you firmly logged on the ground and your center of mass is pulling back at earth but since your mass is negligible as compared to earth it barely feels the tug from you. Newton’s law assumes that gravity is an innate force of an object that can act over a distance.
In his theory of special relativity, Albert Einstein determined that the laws of physics are the same for all non-accelerating observers, and he demonstrated that the speed of light within a vacuum is the same no matter the speed at which an observer travels. Consequently, he concluded that space and time were interwoven into a single continuum know as space-time. Events that take place at the same time for one observer could occur at different times for another.
While working out the equations for his general theory of relativity, Einstein realized that massive objects caused a distortion in space-time. Imagine setting a large body in the center of a trampoline. The body would press down into the fabric, causing it to dimple. A marble rolled around the edge would spiral inward toward the body, pulled in much the same way that the gravity of a planet pulls at rocks in
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Black hole will act like a lens because of the things that lie behind it. Astronomers routinely use this method to learn about galaxies and stars behind massive objects. Einstein’s Cross, a quasar in the Pegasus constellation, is a perfect example of gravitational lensing. The quasar is approximately 8 billion light-years from Earth, and lies behind a galaxy that is 400 million light-years away. Four images of the quasar show up around the galaxy due to the intense gravity of the galaxy that bends the light coming from the quasar.
Gravitational lensing can enable scientists to spot some pretty cool things, but so far, what they observed around the lens has remained fairly static. In another interesting observation, NASA’s Kepler telescope caught sight of a dead star, known as a white dwarf, orbiting a red dwarf in a binary system, Although, the white dwarf is heavier, it has a far smaller radius compared to its companion.
According to Avi Shporer of California Institute of Technology, the technique is similar to spotting a flea on a light bulb 3,000 miles away which is approximately the distance from Log Angeles to New York

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