Albert Einstein was born at Ulm, Kingdom of Württemberg, German Empire, on 14 March 1879. Later he moved to Italy where he continued his education at Aarau. In 1901 he gained his diploma from the Swiss Federal Polytechnic School in Zurich. In 1905 he obtained his doctor's degree. He became a United States citizen in 1940. Einstein honoured with 5 nobel awards in his life. Nobel Prize in Physics (1921),Matteucci Medal (1921),Copley Medal (1925), Max Planck Medal (1929),Time Person of the Century (1999).Einstein died in 18 April 1955, aged 76.
Best Known for
1)General relativity Theorem
According to General relativity theorem, the energy and momentum of all matter and radiation cause curvature in space-time, in a way similar to the creation of electric and magnetic fields by electric charges and currents. This curvature also opens the possibility that the universe is closed, having finite volume but without any boundary. Einstein's theory has important astrophysical implications
. It implies the existence of black holes—regions of space in which space and time are distorted in such a way that nothing, not even light, can escape—as an end-state for massive stars.
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2)Special Relativity Theorem
special relativity was introduced by Albert Einstein in 1905.Special relativity makes two postulates
i)The laws of physics are the same for all non-accelerating observers
ii)The speed of light in vacuum is independent of the motion of all observers and sources, and is observed to have the same value.
Combined with other laws of physics, the two postulates of special relativity predict the equivalence of mass and energy, as expressed in the mass–energy equivalence formula E = mc2, where c is the speed of light in vacuum.
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When solids, liquids and gases absorb energy from light they tend to emit electrons. This is known as Photoelectric effect. The emitted electrons are called photoelectrons.The photoelectric effect requires photons with energies from a few electronvolts to over 1 MeV in high atomic number elements.
Brownian motion is the random motion of particles in a fluid (a liquid or a gas) resulting from their collision with the quick atoms or molecules in the gas or liquid.
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