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Francesco Maria Grimaldi

Francesco Maria Grimaldi
Born April 2, 1618
Bologna
Died December 28, 1663
Bologna
Nationality Italian
Fields mathematics, physics
Known for free fall, diffraction

Francesco Maria Grimaldi, born April 2, 1618 in Bologna (Italy) and dead on December 28, 1663 in Bologna, was an Italian Jesuit priest, mathematician and physicist who taught at the Jesuit college in Bologna.

Between 1640 and 1650, working with Riccioli, he investigated the free fall of objects, confirming that the distance of fall was proportional to the square of the time taken.

In astronomy, he built and used instruments to measure geological features on the Moon, and drew an accurate map or selenograph which was published by Riccioli.

He was the first to make accurate observations on the diffraction of light[1][2] (although by some accounts Leonardo da Vinci had earlier noted it[3]), and coined the word 'diffraction'. Later physicists used his work as evidence that light was a wave, and Isaac Newton used it to arrive at his more comprehensive theory of light.

The crater Grimaldi on the Moon is named after him.

Publications

  • Physicomathesis de lumine, coloribus, et iride, aliisque annexis (published 1665)

References

  1. ^ Francesco Maria Grimaldi, Physico mathesis de lumine, coloribus, et iride, aliisque annexis libri duo (Bologna ("Bonomia"), Italy: Vittorio Bonati, 1665), pages 1-11. Available on-line (in Latin) at: http://fermi.imss.fi.it/rd/bdv?/bdviewer/bid=300682# .
  2. ^ Cajori, Florian "A History of Physics in its Elementary Branches, including the evolution of physical laboratories." MacMillan Company, New York 1899. Available online at: http://books.google.com/books?id=KZ4C-1CRtYQC&ots=c_YpkkbTpT&dq=Florian%20Cajori%20history%20of%20physics&pg=PA88#v=onepage&q=grimaldi&f=false
  3. ^ Guglielmo Libri, Histoire des sciences mathematiques en Italie (1840) [1]

External links

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Quotes

Up to date as of January 14, 2010

From Wikiquote

Francesco Maria Grimaldi (April 2, 1618December 28, 1663) was an Italian mathematician and physicist who taught at the Jesuit college in Bologna. He was the first to make accurate observations on the diffraction of light.

Sourced

  • Lumen propagatur seu diffunditur non solum Directe, Refracte, ac Reflexe, sed etiam alio quodam quarto modo, Diffracte.
    • Light propagates and spreads not only directly, through refraction, and reflection, but also by a fourth mode, diffraction.
    • Physico-mathesis de lumine, coloribus, et iride, aliisque adnexis libri duo: opus posthumum, published in Bologna (1665), [Proposition I].
  • Lumen aliquando per sui communicationem reddit obscuriorem superficiem corporis aliunde, ac prius illustratam.
    • Occasionally, light added to itself may give obscure surfaces on a body that has already received light.
    • also translated as "A body actually enlightened may become obscure by adding new light to that which it has already received." in The Penny cyclopaedia (1845), [p. 668].
    • First account of an interference effect in Physico-mathesis de lumine, coloribus, et iride, aliisque adnexis libri duo: opus posthumum, published in Bologna (1665), [Proposition XXII].

External links

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