Hendrik Antoon Lorentz

 

Hendrik Antoon Lorentz was a Dutch physicist and a joint Nobel Prize winner along with Pieter Zeeman known for his theory of electromagnetic radiation, which was validated by the findings of Zeeman. He was most famous for deriving the transformation equations which formed as the basis of Albert Einstein’s general and special theories of relativity.

Early Life and Education

Hendrik Lorentz was born to Gerrit Frederik Lorentz, a wealthy nursery owner and Geertruida van Ginke on July 18, 1853 at Arnhem in the Netherlands. At only 4 years old, he lost his mother. Five years after his mother’s death, his father married Luberta Hupkes.

During Hendrik Lorentz’s time, grade school held classes in the morning, afternoon, and evening. During evening classes, teaching was freer, more like the Dalton method. Hendrik attended Mr. Timmer’s Primary School until he was 13 years old.

Hendrik was considered a gifted pupil. At the age of 9, he was already able to master the use of the table of logarithms. In 1866, when the first high school was opened at Arnhem, Hendrik was placed in the 3rd form. He excelled in the science subjects and even in history and languages.

After completing the fifth 5th form plus spending a year studying the classics, he entered the University of Leyden in 1870 after passing the examinations that qualified him to proceed. There, he obtained his Bachelor of Science degree in Mathematics. The following year, he got his degree in Physics. By the end of the next year he had become a doctoral candidate.

Career

When he decided to return to Arnhem in 1872, Hendrik taught evening classes, teaching high school physics and mathematics. At the same time, he was working on his doctoral thesis, in which he refined James Clerk Maxwell’s electromagnetic theory. He presented his thesis about the theory of the reflection and refraction of light in 1875, the same year that he obtained his doctor’s degree at age 22.

Three years later, in 1878, he was already appointed the Chair of Theoretical Physics at Leyden University—a position newly created just for him. He was only 24 years old at that time. For the next 20 years, Hendrik devoted his time in quiet and almost isolated study. He kept himself updated with the latest publications in physics without actually establishing personal contacts with other physicists abroad. His first international contact didn’t happen until 1897. At that time, he was already married and a father to three children; two daughters and a son.

Though there were many invitations for him to chair overseas, Hendrik remained loyal to his Alma Mater. He held the position until his retirement in 1912.

After retiring, from 1912 onwards, Hendrik worked as Curator of Teyler’s Physical Cabinet at Haarlem. At the same time, he was also the Secretary of the “Hollandsche Maatschappij der Wetenschappen” or the Dutch Society of Sciences. However, he retained an honorary position at Leyden University as Extraordinary Professor where he continued to deliver his famed Monday morning lectures until his death.

Scientific Works

Hendrik’s greatest science contribution for which he and his student, Pieter Zeeman received a Nobel Prize in 1902 was when he developed a mathematical theory of the electron which proposed that light waves were caused by the oscillations of an electric charge in the atom. His proposal came out at a time when the existence of electrons was yet to be proven.

Hendrik is also best known for his work on the FitzGerald-Lorentz contraction. In 1904, he introduced his transformations which basically described the increase of mass, the reduction of length, and the time dilation of a body that is moving at speeds closest to the velocity of light. This served as the fundamentals of Einstein’s special theory of atoms and theories of relativity. In 1953, Einstein wrote that Lorentz meant more to him than all the others he met on his life’s journey.

In the autumn of 1911, Lorentz was the appointed chairman of the first Solvay Conference that was held in Brussels. One of the critical highlights of the said conference was to take a look into the problems of having two approaches, classical physics and of quantum theory. Hendrik was said to have not been in total acceptance of the latter.

Personal Life

Hendrik was married to Aletta Catharina Kaiser, the daughter of Johann Wilhelm Kaiser who was a director of the Amsterdam’s Engraving School and a professor teaching Fine Arts. In 1982, he designed the first Dutch postage stamps.

Interestingly, Aletta is also the niece of Frederik Kaiser, Hendrik’s astronomy professor who had strongly influenced him to become a physicist.

Hendrik and Aletta had three children. It was believed that the eldest, Geertruida Luberta Lorentz, went on to become a physicist, just like her father.

Hendrik continued his work in physics until the end of his life. He died on February 4, 1928 after becoming seriously ill, in Haarlem, Holland. As described by Owen W. Richardson, a Nobel Laureate, Hendrik’s funeral took place at noon on February 10 in Haarlem. At exactly 12 noon, the state telegraph and telephone services of Holland were stalled for three minutes to pay tribute to “the greatest man Holland has ever produced.”

The funeral was attended by several of Hendrik’s colleagues and distinguished physicists from around the world and even by the President, Sir Ernest Rutherford, who represented the Royal Society.

Awards and Recognition

In addition to being a Nobel Prize recipient, Hendrik Lorentz received other great honors for his outstanding work. He was an LMS Honorary member in 1898, and was elected as a Fellow of the Royal Society in 1905.He was the speaker at the International Congress in 1908, was awarded the Rumford Medal by the Royal Society in 1908 and the Copley Medal in 1918. He was also elected a Fellow of the Royal Society of Edinburgh in 1920.

Hendrik Lorentz, although not totally recognized for his botany work was actually the author of some plant taxa. He also co-wrote a couple of books with other botanists. The Lorentz crater in the moon was named after him.