It is an instrument that aids in
the observation of remote objects by collecting electromagnetic
radiation. Telescopes originated when scientists discovered the
properties of light to deviate from its original path as it passes from
one medium to another, also known as refraction. This ability of a lens
to redirect light to a desired point is what lies behind the basic
telescopic invention. Scientists are known to have used lenses with
variable diameters and focal lengths to achieve desired visuals
magnification of objects in the universe. And there are different celestron telescopes like the refracting telescopes which use different lenses. As
the name suggests, it makes use of refractive properties of light and
is used for terrestrial and astronomical screening. In refraction, the
parallel rays of light are passed through a convex lens that refracts
and converges at a focus. The image at the focus is then observed using
small magnifying lenses called the eyepiece. Reflecting telescopes are
made using mirrors and lenses. It uses the reflective properties of
light which is helpful for astronomical viewing. In this case, we use
the reflective property of light rays that converge parallel rays of
light at the center using a concave reflector/mirror that is magnified
using an eyepiece lens. Once the light gets focused at the prime focus,
the image here is carried to a convenient location for observation using
various systems of auxiliary mirrors and lenses.
These telescopes do not use lens or
optical device. Radio telescope makes use of radio signals from
different sources in the universe. Radio Telescopes help us detect and
map waves beyond visible light, which is just a small part of the
Electromagnetic spectrum. Radio Telescopes also follow the same
principle of converging vast range of radio frequency to a point and
then using this data to map the sources and composition of such signals.
Now that you know what it is and if
you feel that it is interesting then you can go out and give it a try
and buy it and check out the wonders of the sky and who knows you might
discover something out of the ordinary.
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