Refracting Telescopes

Refracting telescopes are comprised of two convex lenses. The objective lens collects light from a distant source, converging it to a focus and forming a real, inverted image inside the telescope. The objective lens needs to be fairly large in order to have enough light-gathering power so that the final image is bright enough to see. Refracting Telescopes commonly known as refractors, telescopes of this kind are used to examine the visible-light region of the electromagnetic spectrum.