Since the dawn of era of Science of reasoning and logic, many great scientists have contributed to this world- great theories, philosophies & inventions.

This page lists two great scientists and their contribution.

## Albert EinsteinEdit

It's not that I'm so smart, it's just that I stay with problems longer.

▬Albert Einstein

**Albert Einstein **was a German-born theoretical physicist. He developed the general theory of relativity, one of the two pillars of modern physics (alongside quantum mechanics).^{[1]}While best known for his mass–energy equivalence formula *E* = *mc*^{2} (which has been dubbed "the world's most famous equation"), he received the 1921 Nobel Prize in Physics "for his services to theoretical physics, and especially for his discovery of the law of the photoelectric effect". The latter was pivotal in establishing quantum theory.

Near the beginning of his career, Einstein thought that Newtonian mechanics was no longer enough to reconcile the laws of classical mechanics with the laws of the electromagnetic field. This led to the development of his special theory of relativity. He realized, however, that the principle of relativity could also be extended to gravitational fields, and with his subsequent theory of gravitation in 1916, he published a paper on the general theory of relativity. He continued to deal with problems of statistical mechanics and quantum theory, which led to his explanations of particle theory and the motion of molecules. He also investigated the thermal properties of light which laid the foundation of the photon theory of light. In 1917, Einstein applied the general theory of relativity to model the large-scale structure of the universe.^{src}

## Sir Isaac NewtonEdit

**Sir Isaac Newton**25 December 1642 – 20 March 1727) was an English physicist and mathematician who is widely recognised as one of the most influential scientists of all time and as a key figure in the scientific revolution. His book

*Philosophiæ Naturalis Principia Mathematica*("Mathematical Principles of Natural Philosophy"), first published in 1687, laid the foundations for classical mechanics. Newton also made seminal contributions to optics and shares credit with Gottfried Leibniz for the invention of infinitesimal calculus.

Newton's *Principia* formulated the laws of motion and universal gravitation, which dominated scientists' view of the physical universe for the next three centuries. It also demonstrated that the motion of objects on Earth and of celestial bodies could be described by the same principles. By deriving Kepler's laws of planetary motion from his mathematical description of gravity, and then using the same principles to account for the trajectories of comets and other phenomena, Newton removed the last doubts about the validity of the heliocentric model of the cosmos.