Large telescopes are needed to collect the weak radiation, coming from faint or very distant sources. The larger the aperture, the brighter the final image will be.
The aperture also has to be much larger than the wave length of the radiation being observed otherwise diffraction will spread the star light out and the image will be blurred not sharp. Radio waves have a very large wave length, so these telescopes are enormous!
The resolving power of a telescope measures how well it can distinguish stars that appear close together. It depends on both the aperture size and the wavelength used.
Aperture=light-gathering area of the telescope.
The reason people build larger Telescopes is because smaller telescopes have a smaller power to them, which results in less detail the farther they look. Larger telescopes use much larger lenses to see much farth and with much more clarity.
There are basically two main reasons.
1) To gather more light - letting you see more faint objects, such as far-away stars.
2) To improve the telescope's resolution, letting you see more details.
Larger telescopes can see fainter objects in space, thus adding to astronomical knowledge.
Because they can capture more light and give a better view of things that they are looking at.
Yes in fact there are many
To have better resolving power, and a much clearer image.
Refracting telescopes suffer from chromatic aberration, refracting telescopes have several surfaces to shape and polish, making large glass lenses without interior defects is very difficult, and large glass lenses are more difficult to support than large mirrors.
Ccd's and in large telescopes
Galileo's desktop telescope, Edwin Hubble's Galaxy Tracker, and Radio Telescopes -as in The Very Large Telescopic Array - the VLTA.
Telescopes are not dangerous in normal operation. A large telescope might hurt you if it fell on you.
To have better resolving power, and a much clearer image.
Refracting telescopes suffer from chromatic aberration, refracting telescopes have several surfaces to shape and polish, making large glass lenses without interior defects is very difficult, and large glass lenses are more difficult to support than large mirrors.
To produce higher resolution images.
Ccd's and in large telescopes
Galileo's desktop telescope, Edwin Hubble's Galaxy Tracker, and Radio Telescopes -as in The Very Large Telescopic Array - the VLTA.
Two large objective lenses.
Large telescopes have improved resolution over small telescopes and as such can gather clearer images of objects further away.
Telescopes are not dangerous in normal operation. A large telescope might hurt you if it fell on you.
to see uranus
my guess is that larger telescopes are stronger than smaller ones. which means they can see farther. .
On top of mountains.
A major factor is a primary cause, a large reason why something happens.