Isaac Newton

(January 4, 1643 - March 31, 1727)

(Gravity theory)

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Sir Isaac Newton was a physicist, mathematics, astronomy, chemistry and philosopher who was born in England. The book, written and published in 1687, Philosophiæ Naturalis Principia Mathematica, described as the most influential books in the history of science. This work describes the laws of gravity and the three principles of (legal) movement, which changed the perception of the physical laws of nature during the next three centuries and became the foundation of modern science.

In 1670 until 1672, Newton provides lessons on optics. And during this period, he himself investigated the refraction of light (refraction: changes in the direction of a wave due to changes in speed) and give demonstrations that a prism can break white light into various color spectrum and a prism lens in the second, can form the color spectrum into a single white light again

Isaac Newton realized that mathematics is a way to explain the laws of nature such as gravity, and make some formula for calculating the 'moving object' and 'gravity'.Gravity is the force that makes an object always moves falling down. With the three basic principles of the law of motion, Newton could explain and prove that the planets circulate around the sun in orbits that are oval and not a full round.

Then Newton uses three basic principles of movement that is now known as Newton's Law to explain how things move.

Isaac Newton's father died three months after Newton was born, and the days of childhood, Newton lived with his grandmother. Newton then went to the village school and then moved to a better sekoah in Grantham, where there he became a pupil with ratings above.

Currently, many stories get told that Newton's formula of the theory of gravity and an apple that fell from the tree. In profiled that one day sit down and learn Newton under an apple tree and it was an apple fall from the tree. By observing a falling apple, Newton came to the conclusion that there is something attractive force that the apple fell down, and the strength that we know today as the gravity.