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Sir Isaac Newton (/ ˈ nj uː t ən /; 25 December 1642 – 20 March 1726/27) [a] was an English polymath active as a mathematician, physicist, astronomer, alchemist, theologian, and author. [5] Newton was a key figure in the Scientific Revolution and the Enlightenment that followed. [ 6 ]
The Newtonian telescope, also called the Newtonian reflector or just a Newtonian, is a type of reflecting telescope invented by the English scientist Sir Isaac Newton, using a concave primary mirror and a flat diagonal secondary mirror. Newton's first reflecting telescope was completed in 1668 and is the earliest known functional reflecting ...
It is described as the better of the instruments Newton built. [2] The first reflecting telescope built by Sir Isaac Newton in 1668 [3] is a landmark in the history of telescopes, being the first known successful reflecting telescope. [4] [5] It was the prototype for a design that later came to be called the Newtonian telescope. There were some ...
Sir Isaac Newton at 46 in Godfrey Kneller's 1689 portrait. The following article is part of a biography of Sir Isaac Newton, the English mathematician and scientist, author of the Principia. It portrays the years after Newton's birth in 1643, his education, as well as his early scientific contributions, before the writing of his main work, the Principia Mathematica, in 1685. Overview of Newton ...
In an apparent early modern example of urban legend, the invention of the pet door was attributed to Isaac Newton (1642–1727) in a story (authored anonymously and published in a column of anecdotes in 1893) to the effect that Newton foolishly made a large hole for his adult cat and a small one for her kittens, not realizing the kittens could ...
1666–1675: Theories on optics proposed by Sir Isaac Newton (1642–1726/7); Newton published Opticks in 1704. 1687: Law of universal gravitation formulated in the Principia by Sir Isaac Newton (1642–1726/7). 1687: Newton's laws of motion formulated in the Principia. 1800: Infrared radiation discovered by Sir William Herschel (1738–1822).
The fallen tree was a scion of the original apple tree which was said to have inspired Sir Isaac Newton to formulate his theory of gravity by watching an apple fall from it in the 1660s ...
The books were a model of popular science exposition: although Newton's English is somewhat dated—he shows a fondness for lengthy sentences with much embedded qualifications—the book can still be easily understood by a modern reader. In contrast, few readers of Newton's time found the Principia accessible or even comprehensible. His formal ...