Alexandre-Edmond Becquerel

Alexandre-Edmond Becquerel (March 24, 1820 - May 11, 1891) was a French physicist who studied the solar spectrum, magnetism, electricity, and optics. He is known for his work in luminescence and phosphorescence. He was the son of Antoine César Becquerel and the father of Henri Becquerel. Download high resolution version (615x846, 88 KB)In the public domain by age This image has been released into the public domain by the copyright holder, its copyright has expired, or it is ineligible for copyright. ... Download high resolution version (615x846, 88 KB)In the public domain by age This image has been released into the public domain by the copyright holder, its copyright has expired, or it is ineligible for copyright. ... March 24 is the 83rd day of the year in the Gregorian Calendar (84th in Leap years). ... 1820 was a leap year starting on Saturday (see link for calendar). ... May 11 is the 131st day of the year in the Gregorian Calendar (132nd in leap years). ... 1891 (MDCCCXCI) was a common year starting on Thursday (see link for calendar). ... A physicist is a scientist trained in physics. ... In physics, magnetism is one of the phenomena by which materials exert an attractive or repulsive force on other materials. ... Lightning strikes during a night-time thunderstorm. ... Table of Opticks, 1728 Cyclopaedia Optics (appearance or look in ancient Greek) is a branch of physics that describes the behavior and properties of light and the interaction of light with matter. ... Luminescence is light not generated by high temperatures alone. ... Phosphorescent powder under visible light, ultraviolet light, and total darkness. ... Antoine César Becquerel (March 8, 1788 – January 18, 1878) was a French scientist and a pioneer in the study of electric and luminescent phenomena. ... Antoine Henri Becquerel (December 15, 1852 – August 25, 1908) was a French physicist, Nobel laureate, and one of the discoverers of radioactivity. ...

Becquerel was born in Paris, and was in turn the pupil, assistant and successor of his father at the Musee d'Histoire Naturelle. He was also appointed professor at the short-lived Agronomic Institute at Versailles in 1849, and in 1853 received the chair of physics at the Conservatoire des Arts et Metiers. Edmond Becquerel was associated with his father in much of his work, but he himself paid special attention to the study of light, investigating the photochemical effects and spectroscopic characters of solar radiation and the electric light, and the phenomena of phosphorescence, particularly as displayed by the sulphides and by compounds of uranium. It was in connection with these latter inquiries that he devised his phosphoroscope, an apparatus which enabled the interval between exposure to the source of light and observation of the resulting effects to be varied at will and accurately measured. The Eiffel Tower, the international symbol of the city, with the skyscrapers of La Défense business district 3 miles behind. ... Versailles in 1789. ... 1849 was a common year starting on Monday (see link for calendar). ... 1853 was a common year starting on Saturday (see link for calendar). ... Solar irradiance spectrum at top of atmosphere. ... General Name, Symbol, Number uranium, U, 92 Chemical series actinides Group, Period, Block n/a, 7, f Appearance silvery gray metallic; corrodes to a spalling black oxide coat in air Atomic mass 238. ...

Becquerel published in 1867-68 a treatise in two volumes on La Lumière, ses causes et ses effets. He also investigated the diamagnetic and paramagnetic properties of substances; and was keenly interested in the phenomena of electrochemical decomposition, accumulating much evidence in favor of Faraday's law of electrolysis and proposing a modified statement of it which was intended to cover certain apparent exceptions. 1867 (MDCCCLXVII) was a common year starting on Tuesday (see link for calendar). ... 1868 (MDCCCLXVIII) was a leap year starting on Wednesday (see link for calendar) of the Gregorian calendar or a leap year starting on Friday of the 12-day-slower Julian calendar. ... To meet Wikipedias quality standards, this article or section may require cleanup. ...

He discovered the photovoltaic effect, which is the physics behind the solar cell, in 1839.

Initial text from a Encyclopædia Britannica Eleventh Edition. Please update as needed. Encyclopædia Britannica, the 11th edition The Encyclopædia Britannica Eleventh Edition (1910–1911) is perhaps the most famous edition of the Encyclopædia Britannica. ...