Question

Newtonian reflecting type telescope uses.

Answer 1

Hint:Refracting telescopes or refractors are telescopes that make use of the refractive property of lenses. The lenses in a refractor must be very large if it is to have a large light-gathering capacity (which is needed for astronomical observations).

Complete answer:
A reflecting telescope (also known as a reflector) is a type of telescope that uses a single or multiple curved mirrors to reflect light and create an image. Isaac Newton developed the reflecting telescope as an alternative to the refracting telescope, which suffered from extreme chromatic aberration at the time.

Reflecting telescopes produce other types of optical aberrations, but they have the advantage of allowing very large diameter targets. Reflectors make up almost all of the major telescopes used in astronomy science. Extra optical elements can be used to enhance image quality or to position the image in a mechanical system in reflecting telescopes. Reflecting telescopes are often referred to as "catoptric" telescopes because they use mirrors.

Reflecting telescopes have become extremely common in astronomy, with many well-known telescopes, including the Hubble Space Telescope and popular amateur versions, employing this design. In addition, the reflecting telescope principle has been extended to other wavelengths of light, and image forming optics in X-Ray telescopes, for example, are made using the reflection principle.

Note:In comparison to refractors, reflecting telescopes have a host of other advantages. Since reflected light does not scatter according to wavelength, they are not subject to chromatic aberration. A reflector's telescope tube is also shorter than that of a refractor of the same diameter, lowering the tube's cost.