Ccd's and in large telescopes
Both types of telescope collect and focus electromagnetic radiation for observational purposes, the difference is their band of observed frequencies. Radio telescopes are used for the radio frequencies ( ~3km - ~30cm) while optical telescopes are used for frequencies closer to visible light ( ~0.7μm - ~0.4μm). Optical telescopes may also be able to detect infrared and ultraviolet light.
Radiation other than light and radio waves hardly penetrates Earth's atmosphere.
Good telescopes don't use glass lenses for magnification, because they refract different colors is slightly different angles (known as prism effect), but they use spherical mirrorsinstead. Telescopes with lenses have the advantage of being smaller, cheaper and lighter.Therefore refracting telescopes use lenses, and reflecting telescopes use mirrors.
Mirrors and telescopes use light reflection.
The Hubble Space Telescope (HST) is an example of an optical telescope, as are the Keck Observatory on Mauna Kea, Hawaii. the Hale Telescope at the Palomar Observatory in California and the Hooker 100 inch Telescope at the Mt Wilson Observatory, also California.
Optical and Radio telescopes.
Researchers use all of these: -- optical telescopes -- radio telescopes -- x-ray telescopes -- infra-red telescopes -- ultraviolet telescopes
The largest telescopes that use visible light are reflector telescopes.
The largest telescopes that use visible light are reflector telescopes.
As far as I know, there is no "optical radio telescope". There are, separately, optical telescopes (which work with visible light), and radio telescopes (which work with radio waves).
An optical telescope.
Some design variants you may see in an optical telescope include telescopes that fold or divert the optical path with mirrors and telescopes that use special lenses to enhance the images.
Optical telescopes use either lens' (refractory) or mirrors (reflective) to magnify light. Radio telescopes use dishes to pick up radio waves. sensors on the dishes collect the waves and turn them into a picture
Scientists use telescopes, such as optical telescopes, radio telescopes, and space telescopes, to observe objects in the night sky. They also use instruments like spectrographs and cameras to analyze the light from celestial objects and gather data for research and study.
concave mirrors, and curved mirrors
to enjoy the beauty of the stars.
they use space probes,satellites,and of coarse,telescopes.