Joseph Petzval
Mathematician known for lens theory
Mathematician known for lens theory
1891
135 years ago — 84 years old
Scientists & Innovators
Hungary
A mathematician and physicist, contributed significantly to the field of optics and the development of photographic lenses. Proposed the Petzval lens design in 1840, which greatly enhanced image quality in photography. Worked on the mathematics related to optical systems and made advancements in the understanding of image formation. His work laid foundational principles for modern photography and lens manufacturing.
Developed the Petzval lens design
Contributed to the mathematics of optics
Born in 1367, ascended the throne in 1377 at the age of 10. His reign faced significant challenges, including the Peasants' Revolt in 1381. Richard II struggled with political factions, notably the rivalry with the Lords Appellant. His rule experienced a shift towards autocracy, and he established a more centralized monarchy. The deposition in 1399 marked the end of his reign, resulting in a troubled legacy and eventual death in custody in 1400.
Continue ReadingOne individual served as the 37th Governor of Massachusetts from 1891 to 1892. This politician was a member of the Democratic Party and held various roles in state politics throughout the late 19th century. Prior to becoming governor, significant contributions were made in the state legislature. Engaged in law practice, this individual also held the position of Massachusetts Attorney General.
Continue ReadingA prominent figure in the revival of Breton music, this artist integrated traditional Celtic harp playing with contemporary music styles. Contributions included creating a bridge between traditional Breton culture and modern music. Through performances and recordings, brought attention to lesser-known Celtic folk traditions, influencing a generation of musicians dedicated to preserving and innovating traditional music forms. Released acclaimed albums, significantly impacting the world music genre and highlighting the harp's role within it.
Continue ReadingOne of the leading fly-halves in rugby union history, contributed significantly to the success of the Welsh national team during the late 1960s and early 1970s. Played a key role in Wales’ Grand Slam victories in 1969 and 1971. His performance in the 1971 series against the All Blacks is often highlighted as one of the greatest in rugby history. Captained the British and Irish Lions during the 1971 tour to New Zealand, leading a team that achieved a historic series win against the All Blacks. After retiring from rugby, transitioned to a successful career as a sports commentator and analyst, sharing insights on the game and its evolution.
Continue ReadingPlayed professional ice hockey primarily as a left winger. Spent significant portions of career with the Montreal Canadiens and the Florida Panthers in the NHL. Also played in leagues in Europe, including the Slovak Extraliga. Represented Slovakia in international competitions, contributing to the national team's success.
Continue ReadingAn American poet and academic, contributions included teaching at various institutions and publishing multiple poetry collections. Most significant works include 'Another Turn' and 'Cooling Time: An American Poetry Perspective'. Engaged with themes of personal experience and broader societal issues, utilizing a distinctive voice and style. Served as a professor at the University of Arkansas at Little Rock and was involved in the founding of the Arkansas Literary Festival. Received accolades for literary achievements, showcasing a commitment to the craft of poetry.
Continue Reading