Icon class icon_class fas fa-quote-left icon_class_computed fas fa-quote-left Related content Our first Parsing Analysis diagram about telescopes Overview of all diagrams after moving elicited model elements out of the '0-source' zone Source Wikipedia Copyright information Text from Wikipedia and Wiktionary web pages quoted for educational purposes is subject to the Wikipedia Creative Commons Attribution ShareAlike Licence Snippet kind INFO Keywords telescope optical telescope astronomy Previous snippet In the 20th century, many new types of telescopes were invented, including radio telescopes in the 1930s and infrared telescopes in the 1960s. Full quote The word telescope now refers to a wide range of instruments capable of detecting different regions of the electromagnetic spectrum, and in some cases other types of detectors. URL https://en.wikipedia.org/wiki/Telescope Next snippet Related snippets A telescope is an optical instrument using lenses, curved mirrors [DISPUTED], or a combination of both to observe distant objects ... Related snippets (backlinks) The first known practical telescopes were refracting telescopes invented in the Netherlands at the beginning of the 17th century, by using glass lenses. They were used for both terrestrial applications and astronomy. The reflecting telescope, which uses mirrors to collect and focus light, was invented within a few decades of the first refracting telescope. In the 20th century, many new types of telescopes were invented, including radio telescopes in the 1930s and infrared telescopes in the 1960s. A reflecting telescope (also called a reflector) is a telescope that uses a single or a combination of curved mirrors that reflect light and form an image. Visit also Visit also (backlinks) Flags
