A refracting telescope works by bending light with its lenses. It gathers and focuses the light by using the objective lens to make a small image of the object and using the eyepiece lens to magnify the image.Continue Reading
The lens' curvature also influences the quality of the telescope's images. The size of the image that the lens produces is directly related to the lens' focal length. As the focal length increases, the size of the image also increases. This is one of the refracting telescope's disadvantages since a long focal length means a long telescope. Other disadvantages of the refracting telescope include the inability to transmit all the light since some light is lost to absorption or reflection and large lenses that can be difficult to make.
Galileo created the first refracting telescope using a convex primary lens and a concave eyepiece lens. To enable his telescope to produce as clear of an image as possible, Galileo used math to calculate the distance between the lenses. He was able to see only a small part of the sky at any time, and the telescope produced fuzzy images from spherical aberration. This early telescope magnified objects three times, and his later creations were able to magnify objects up to 30 times.Learn more about Astronomy
Refracting telescopes use objective lenses to collect light from distant images and bring those images into focus. Reflecting telescopes use primary mirrors. Both refractors and reflectors utilize an eyepiece lens that magnifies the image.Full Answer >
The astronomical telescope is a central apparatus used to study distant planets, stars and moons from the Earth. Astronomer Galileo Galilei famously used the earliest telescopes in 1610 to prove the heliocentric solar system theory put forth by Nicolaus Copernicus in the early 16th century.Full Answer >
The Tasco 100 x 50mm refractor telescope is a good telescope for kids. It is both sturdy and easy to set up. Although the telescope is targeted at children, it is powerful enough for adult use.Full Answer >
The James Webb Space Telescope is said to be the most powerful telescope in the world as of 2014. However, NASA is already building the Advanced Telescope Large-Aperture Space Telescope, which is expected to be even more powerful.Full Answer >