One problem with refracting telescopes is that there is a frequency dependence for refraction, so the amount of refraction at each surface of the lens depends on the wavelength. Thus, different wavelengths focus at slightly different points. Why are refracting telescopes no longer used? Limitations of Refracting Telescopes This occursRead More →
Refracting telescopes Lenses are curved pieces of glass or plastic, which bend rays of light and can make objects appear bigger. Refracting telescopes use one or more lenses to collect and focus the light from objects in space, forming an image. Then, an eyepiece lens enlarges, or magnifies, the imageRead More →
The Hubble Space Telescope is an international collaboration between NASA and the European Space Agency (ESA). Who built Hubble telescope? NASA’s immense Hubble space telescope launched on April 24, 1990. Lockheed Martin built the complex spacecraft at its facility in Sunnyvale, California. How many spacewalks did it take to fixRead More →
Galileo made his first telescope in 1609, modeled after telescopes produced in other parts of Europe that could magnify objects three times. He created a telescope later that same year that could magnify objects twenty times. Was Galileo the first to use a telescope? Galileo Galilei did not invent theRead More →