achromatic telescope वाक्य
उदाहरण वाक्य
मोबाइल
- He was the first to enunciate errors in achromatic telescope.
- In 1830 Holcomb brought an achromatic telescope to Professor Benjamin Silliman at Yale University in New Haven.
- Among them was an elegant solution of the problem to determine the orbit of a comet from three observations and works on achromatic telescopes.
- He also met a brass-worker named J . A . Peltzer, who was a mathematician and owned a 60-power Tiedemann achromatic telescope.
- He is known for discovering the dark absorption lines known as Fraunhofer lines in the Sun's spectrum, and for making excellent optical glass and achromatic telescope objectives.
- At a trial in Westminster Hall about the patent rights granted to John Dollond ( Watkin v . Dollond ), Hall was admitted to be the first inventor of the achromatic telescope.
- The difficulty of procuring disks of glass ( especially of flint glass ) of suitable purity and homogeneity limited the diameter and light gathering power of the lenses found in the achromatic telescope.
- The 7.5 foot mahogany and brass achromatic telescope with an equatorial mount was built by the German manufacturer Merz and Son at a cost of ?504.11s . 9d.
- The Academy of Sciences of Caen chose him a foreign member about 1764, and he observed there, with John Dollond's six-foot achromatic telescope, the partial solar eclipse of 16 August 1765.
- James Gregory and Leonhard Euler arrived at the correct view from a false conception of the achromatism of the eye; this was determined by Chester More Hall in 1728, Klingenstierna in 1754 and by Dollond in 1757, who constructed the celebrated achromatic telescopes . ( See telescope .)
- The Museum Gustavianum has an excellent science collection of very old telescopes of Celsius and other astronomers, the oldest achromatic telescope, a book with Copernicus notes on solar eclipses, a major Carl Linnaeus exhibition and currently an exhibition of the oldest known astronomical instrument and computer, the Antikythera Mechanism.
- Highlights include the first achromatic telescope; an early solar microscope, created by German anatomists Johann Nathanael Lieberk�hn; an early seismograph created by Boris Borisovich Galitzine; galvanoplastics by Moritz von Jacobi; and early electric lights by Pavel Yablochkov . The automobile exhibit includes a Russo-Balt K12 / 20 and a GAZ-M20 Pobeda.
- Although there had been very large ( and unwieldy ) Non-achromatic aerial telescopes of the late 17th century, and Chester Moore Hall and others had experimented with small achromatic telescopes in the 18th century, John Dollond ( 1706 1761 ) invented and created an achromatic object glass and lens which permitted achromatic telescopes up to 3 5 in ( 8 13 cm ) aperture.
- Although there had been very large ( and unwieldy ) Non-achromatic aerial telescopes of the late 17th century, and Chester Moore Hall and others had experimented with small achromatic telescopes in the 18th century, John Dollond ( 1706 1761 ) invented and created an achromatic object glass and lens which permitted achromatic telescopes up to 3 5 in ( 8 13 cm ) aperture.
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