Galilean telescope
Galilean telescope
Noun | 1. | ![]() |
单词 | galilean telescope | |||
释义 | Galilean telescopeGalilean telescope
Galilean telescope![]() Galilean telescope() The first type of astronomical telescope, developed in 1609 by Galileo from Hans Lippershey's ‘magic tubes’. It is a refractor made up from a single long-focus object lens and a powerful diverging lens used as an eyepiece (see illustration). This optical system, which gives an upright image, survives in modern opera glasses. Galileo's best telescopes had a magnification of about 30 times; although very imperfect, they led to the great achievements of 17th-century astronomy. See also telescope.
Galilean telescope[‚gal·ə¦lē·ən ′tel·ə‚skōp]Galilean telescope
Words related to Galilean telescope
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