To make a tv telescope
They usually ARE used together, because astronomers want to see if there is anything visible at the same place as this bright radio source in the sky.
radio telescope detects radio waves and a light telescope views light waves.
A radio telescope detects light in the form of radio waves and a refracting telescope detects light in the visible wavelengths
A radio telescope.
Radio telescopes collect radio waves. Optical telescopes capture visible light waves.
The most powerfull type of telescope is the Radio telescope. Radio waves travel much further than light waves.
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).
No.
Radio Telescope observe light of a different wavelength then optical light. Radio waves have a longer wavelength then visible light. Some interstellar objects barley emit any light in the visible spectrum but emit a significant amount of radiation in the radio spectrum. Radio telescopes enable us to view objects which emit in the radio spectrum.
An optical telescope focuses and concentrates visible light; radio telescopes focus and concentrate electromagnetic radiation (which means, "light") in the radio part of the spectrum.
They all collect and focus light and other forms of electromagnetic radation.
The surface of a radio telescope doesn't have to be as flawless as the surface of an optical telescope because the radio telescope is collecting radio waves, something that will not be affected by faults in the glass. Optical telescopes, on the other hand, are collecting light, where faults in the surface can interfere with the image.