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Answer:
In 1906, Galileo constructed a telescope which provides an erect image of an object only with the help of two lenses. The Galileo's telescope consists of two lenses located at the ends of a long tube as shown in the figure below. The objective was a convex lens and eye piece was a concave lens.
A radio telescope is a specialized antenna and radio receiver used to receive radio waves from astronomical radio sources in the sky in radio astronomy. ... The first purpose-built radio telescope was a 9-meter parabolic dish constructed by radio amateur Grote Reber in his back yard in Wheaton, Illinois in 1937.
Optical telescopes are located in uninhabited places on mountains in order to avoid the distortion of starlight caused due to the atmosphere. ... The myth that astronomers build them on tall mountains to be more close to the objects they are viewing is totally wrong.
X-ray telescope cannot be based on the Earth because X-rays do not reach the Earth surface as they are blocked by the Earth's atmosphere.