* 1629 – Christiaan Huygens, Dutch mathematician ( d. 1695 )

In 1691 Gottfried Leibniz, Christiaan Huygens, and Johann Bernoulli derived the equation in response to a challenge by Jakob Bernoulli.

The mathematical description was derived in 1659 by Dutch physicist Christiaan Huygens.

Augustin-Jean Fresnel did more definitive studies and calculations of diffraction, made public in 1815 and 1818, and thereby gave great support to the wave theory of light that had been advanced by Christiaan Huygens and reinvigorated by Young, against Newton's particle theory.

It was notable for containing the principles of the stereographic and the orthographic projections, and it inspired the works of Desargues and Christiaan Huygens.

* Christiaan Huygens 1629 – 1695 ( Netherlands )

Christiaan Huygens experimented with gunpowder in 1673 in an early attempt to build an internal combustion engine, but he did not succeed.

The Huygens – Fresnel principle ( named after Dutch physicist Christiaan Huygens and French physicist Augustin-Jean Fresnel ) is a method of analysis applied to problems of wave propagation both in the far-field limit and in near-field diffraction.

* Christiaan Huygens

Christiaan Huygens, prior to Newton, had hypothesized that light was a wave propagating through an aether, but Newton rejected this idea.

In 1668, Wilkins proposed using Christopher Wren's suggestion of a pendulum with a half-period of one second to measure a standard length that Christiaan Huygens had observed to be 38 Rhineland or English inches ( 997mm ) in length.

* 1655 – Saturn's largest moon, Titan, is discovered by Christiaan Huygens.

There has been some debate about who the original inventor of the magic lantern is, but the most widely accepted theory is that Christiaan Huygens developed the original device in the late 1650s.

This phenomenon was first observed by Christiaan Huygens in 1665.

Christiaan Huygens published the first book on probability

Christiaan Huygens ( 1657 ) gave the earliest known scientific treatment of the subject.

File: Christiaan Huygens-painting. jpeg | Christiaan Huygens ( 1629-1695 ): studied the rings of Saturn and discovered its moon Titan, invented the pendulum clock, studied optics and centrifugal force, theorized that light consists of waves ( Huygens – Fresnel principle ) which became instrumental in the understanding of wave-particle duality.

Christiaan Huygens published a book on the subject in 1657 and in the 19th century a big work was done by Laplace in what can be considered today as the classic interpretation.

From its invention in 1656 by Christiaan Huygens until the 1930s, the pendulum clock was the world's most precise timekeeper, accounting for its widespread use.

The pendulum clock was invented in 1656 by Dutch scientist Christiaan Huygens, and patented the following year.

Optics, for instance, was revolutionized by people like Robert Hooke, Christiaan Huygens, René Descartes and, once again, Isaac Newton, who developed mathematical theories of light as either waves ( Huygens ) or particles ( Newton ).

Christiaan Neethling Barnard ( 8 November 1922 – 2 September 2001 ) was a South African cardiac surgeon who performed the world's first successful human-to-human heart transplant.

It was designed by architect Louis Christiaan Kalff, while the exhibition was conceived by James Gardner.

This cosmology was accepted by Isaac Newton, Christiaan Huygens and later scientists.

The idea of duality originated in a debate over the nature of light and matter that dates back to the 17th century, when competing theories of light were proposed by Christiaan Huygens and Isaac Newton: light was thought either to consist of waves ( Huygens ) or of particles ( Newton ).

The earliest comprehensive theory of light was advanced by Christiaan Huygens, who proposed a wave theory of light, and in particular demonstrated how waves might interfere to form a wavefront, propagating in a straight line.

Christiaan Huygens, FRS ( or ; ; 14 April 1629 – 8 July 1695 ) was a prominent Dutch mathematician, astronomer, physicist and horologist.

The first engagement of this new form of warfare was at Sanna's Post on 31 March where 1, 500 Boers under the command of Christiaan De Wet attacked Bloemfontein's waterworks about east of the city, and ambushed a heavily escorted convoy, which caused 155 British casualties and the capture of seven guns, 117 wagons, and 428 British troops.

A bitter dispute between Hooke and Christiaan Huygens on the priority of this invention was to continue for centuries after the death of both ; but a note dated 23 June 1670 in the Hooke Folio ( see External links below ), describing a demonstration of a balance-controlled watch before the Royal Society, has been held to favour Hooke's claim.

Although mathematics was not part of his course work, de Moivre read several mathematical works on his own including Elements de mathematiques by Father Prestet and a short treatise on games of chance, De Ratiociniis in Ludo Aleae, by Christiaan Huygens.

His place was taken by acting president J. Christiaan Heunis.

Van Schooten's father was a professor of mathematics at Leiden, having Christiaan Huygens, Johann van Waveren Hudde, and René de Sluze as students.

He was secretary to two Princes of Orange: Frederick Henry and William II, and the father of the scientist Christiaan Huygens.

Constantijn Huygens was born in The Hague, the second son of Christiaan Huygens ( senior ), secretary of the Council of State, and Susanna Hoefnagel, niece of the Antwerp painter Joris Hoefnagel.

A week later he was buried in the Grote Kerk in the Hague, together with his son, the famous scientist Christiaan Huygens.

At the time, such speculation was of a rather rarefied sort, and was limited to astronomers like Christiaan Huygens who wrote a book, Cosmotheoros ( 1698 ) considering the possibility of life on other planets ; or to philosophers like Campanella, who wrote in defense of Galileo.

Christiaan Eijkman was born on 11 August 1858, at Nijkerk, Netherlands as the seventh child of Christiaan Eijkman, the headmaster of a local school, and Johanna Alida Pool.

Christiaan " Chris " Gerrit Herman Bruil ( born 20 December 1970 in Doetinchem, Gelderland ) is a male badminton player from the Netherlands.

Bastiaan Johan Christiaan " Bas Jan " Ader ( born April 19, 1942 Winschoten, The Netherlands-lost at sea in 1975 between Cape Cod, Massachusetts and Ireland ) was a conceptual artist, performance artist, photographer and filmmaker.

In the fifty years after establishment the Dutch Reformed Church was prominent there and one of the dominees who served there was the famous Rev Andrew Murray. The famous Second Boer War General Christiaan de Wet was born on the nearby farm Leeukop in 1854.

Giovanni Christiaan van Bronckhorst (; born 5 February 1975 in Rotterdam ), known as Gio in Spain, is a retired Dutch footballer of Moluccan ( Indonesia ) descent who served as the captain of the Dutch national team from August 2008 until his retirement.

* 24 May-Jan Christiaan Smuts, a South African statesman and soldier is born near Riebeeck West, in the Cape Colony