achromatic telescope meaning in Hindi

Examples

1. He was the first to enunciate errors in achromatic telescope.
2. In 1830 Holcomb brought an achromatic telescope to Professor Benjamin Silliman at Yale University in New Haven.
3. Among them was an elegant solution of the problem to determine the orbit of a comet from three observations and works on achromatic telescopes.
4. He also met a brass-worker named J . A . Peltzer, who was a mathematician and owned a 60-power Tiedemann achromatic telescope.
5. 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.
6. 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.
7. 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.
8. 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.
9. 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.
10. 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 .)