**100 years** ago this month, Albert Einstein redefines** General Relativity theory**, that remains foundational up to our days.

November marks the 100 anniversary of* General relativity*, a theory of gravitation developed by Albert Einstein between 1907 and 1915.

*Above: From the meeting between Einstein and Chaplin.*

According to *general relativity*, the observed gravitational effect between masses results from their warping of spacetime.

If you don’t understand the theory, it’s OK, you are not alone…

Meeting between Chaplin and Einstein:

-“What I admire most about your art” Albert Einstein said, “is its universality. You do not say a word, and yet … the world understands you.”

– It’s true reply Chaplin: “But your fame is even greater… the world admires you, when nobody understands you.”..!!

**General relativity**, also known as the *general theory of relativity*, is the geometric theory of gravitation published by Albert Einstein in 1915 and the current description of gravitation in modern physics. General relativity generalizes special relativity and Newton’s law of universal gravitation, providing a unified description of gravity as a geometric property of space and time, or spacetime. In particular, the curvature of spacetime is directly related to the energy and momentum of whatever matter and radiation are present. The relation is specified by the Einstein field equations, a system of partial differential equations.

*In this 1919 negative of a solar eclipse, showing light bending around the Sun as predicted in the general relativity, British scientist Sir Arthur Eddington helped verify Einstein’s theory. Credit Wikimedia Commons*

source wikipedia

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